Paleontology: The study of early forms of life through fossil remains.Fossil Fuels: Any combustible hydrocarbon deposit formed from the remains of prehistoric organisms. Examples are petroleum, coal, and natural gas.Amber: A yellowish fossil resin, the gum of several species of coniferous trees, found in the alluvial deposits of northeastern Germany. It is used in molecular biology in the analysis of organic matter fossilized in amber.Biological Evolution: The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics.Hominidae: Family of the suborder HAPLORHINI (Anthropoidea) comprising bipedal primate MAMMALS. It includes modern man (HOMO SAPIENS) and the great apes: gorillas (GORILLA GORILLA), chimpanzees (PAN PANISCUS and PAN TROGLODYTES), and orangutans (PONGO PYGMAEUS).Dinosaurs: General name for two extinct orders of reptiles from the Mesozoic era: Saurischia and Ornithischia.Paleodontology: The study of the teeth of early forms of life through fossil remains.Extinction, Biological: The ceasing of existence of a species or taxonomic groups of organisms.Phylogeny: The relationships of groups of organisms as reflected by their genetic makeup.Geology: The science of the earth and other celestial bodies and their history as recorded in the rocks. It includes the study of geologic processes of an area such as rock formations, weathering and erosion, and sedimentation. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Geological Phenomena: The inanimate matter of Earth, the structures and properties of this matter, and the processes that affect it.History, Ancient: The period of history before 500 of the common era.Dentition: The teeth collectively in the dental arch. Dentition ordinarily refers to the natural teeth in position in their alveoli. Dentition referring to the deciduous teeth is DENTITION, PRIMARY; to the permanent teeth, DENTITION, PERMANENT. (From Jablonski, Dictionary of Dentistry, 1992)Skull: The SKELETON of the HEAD including the FACIAL BONES and the bones enclosing the BRAIN.Tooth: One of a set of bone-like structures in the mouth used for biting and chewing.Reptiles: Cold-blooded, air-breathing VERTEBRATES belonging to the class Reptilia, usually covered with external scales or bony plates.Coniferophyta: A plant division of GYMNOSPERMS consisting of cone-bearing trees and shrubs.Anthropology: The science devoted to the comparative study of man.Invertebrates: Animals that have no spinal column.Skeleton: The rigid framework of connected bones that gives form to the body, protects and supports its soft organs and tissues, and provides attachments for MUSCLES.Genetic Speciation: The splitting of an ancestral species into daughter species that coexist in time (King, Dictionary of Genetics, 6th ed). Causal factors may include geographic isolation, HABITAT geometry, migration, REPRODUCTIVE ISOLATION, random GENETIC DRIFT and MUTATION.Geography: The science dealing with the earth and its life, especially the description of land, sea, and air and the distribution of plant and animal life, including humanity and human industries with reference to the mutual relations of these elements. (From Webster, 3d ed)Cetacea: An order of wholly aquatic MAMMALS occurring in all the OCEANS and adjoining seas of the world, as well as in certain river systems. They feed generally on FISHES, cephalopods, and crustaceans. Most are gregarious and most have a relatively long period of parental care and maturation. Included are DOLPHINS; PORPOISES; and WHALES. (From Walker's Mammals of the World, 5th ed, pp969-70)Anatomy, Comparative: The comparative study of animal structure with regard to homologous organs or parts. (Stedman, 25th ed)Evolution, Molecular: The process of cumulative change at the level of DNA; RNA; and PROTEINS, over successive generations.Angiosperms: Members of the group of vascular plants which bear flowers. They are differentiated from GYMNOSPERMS by their production of seeds within a closed chamber (OVARY, PLANT). The Angiosperms division is composed of two classes, the monocotyledons (Liliopsida) and dicotyledons (Magnoliopsida). Angiosperms represent approximately 80% of all known living plants.Ecosystem: A functional system which includes the organisms of a natural community together with their environment. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)Biodiversity: The variety of all native living organisms and their various forms and interrelationships.Mammals: Warm-blooded vertebrate animals belonging to the class Mammalia, including all that possess hair and suckle their young.Evolution, Planetary: Creation and development of bodies within solar systems, includes study of early planetary geology.Birds: Warm-blooded VERTEBRATES possessing FEATHERS and belonging to the class Aves.Egg Shell: A hard or leathery calciferous exterior covering of an egg.Neanderthals: Common name for an extinct species of the Homo genus. Fossils have been found in Europe and Asia. Genetic evidence suggests that limited interbreeding with modern HUMANS (Homo sapiens) took place.Geologic Sediments: A mass of organic or inorganic solid fragmented material, or the solid fragment itself, that comes from the weathering of rock and is carried by, suspended in, or dropped by air, water, or ice. It refers also to a mass that is accumulated by any other natural agent and that forms in layers on the earth's surface, such as sand, gravel, silt, mud, fill, or loess. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1689)ArtiodactylaAnimal Shells: The hard rigid covering of animals including MOLLUSCS; TURTLES; INSECTS; and crustaceans.Radiometric Dating: Techniques used to determine the age of materials, based on the content and half-lives of the RADIOACTIVE ISOTOPES they contain.Time: The dimension of the physical universe which, at a given place, orders the sequence of events. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Arthropods: Members of the phylum Arthropoda, composed of organisms having a hard, jointed exoskeleton and paired jointed legs. It includes the class INSECTS and the subclass ARACHNIDA, many species of which are important medically as parasites or as vectors of organisms capable of causing disease in man.Archaeology: The scientific study of past societies through artifacts, fossils, etc.WyomingAlligators and Crocodiles: Large, long-tailed reptiles, including caimans, of the order Loricata.Geological Processes: Events and activities of the Earth and its structures.Classification: The systematic arrangement of entities in any field into categories classes based on common characteristics such as properties, morphology, subject matter, etc.Body Size: The physical measurements of a body.Gymnosperms: Gymnosperms are a group of vascular plants whose seeds are not enclosed by a ripened ovary (fruit), in contrast to ANGIOSPERMS whose seeds are surrounded by an ovary wall. The seeds of many gymnosperms (literally, "naked seed") are borne in cones and are not visible. Taxonomists now recognize four distinct divisions of extant gymnospermous plants (CONIFEROPHYTA; CYCADOPHYTA; GINKGOPHYTA; and GNETOPHYTA).Vertebrates: Animals having a vertebral column, members of the phylum Chordata, subphylum Craniata comprising mammals, birds, reptiles, amphibians, and fishes.Menispermaceae: A plant family of the order Ranunculales, subclass Magnoliidae, class Magnoliopsida. Members are mostly vines and shrubs and they contain isoquinoline alkaloids, some of which have been used as arrow poisons.Sirenia: An order of heavy-bodied, slow-moving, completely aquatic, herbivorous mammals. The body is fusiform, plump, and hairless, except for bristles on the snout. Hindlimbs are absent, the forelimbs are modified to flippers, and the tail is a horizontal fluke. (From Scott, Concise Encyclopedia Biology, 1996)Echinodermata: A phylum of the most familiar marine invertebrates. Its class Stelleroidea contains two subclasses, the Asteroidea (the STARFISH or sea stars) and the Ophiuroidea (the brittle stars, also called basket stars and serpent stars). There are 1500 described species of STARFISH found throughout the world. The second class, Echinoidea, contains about 950 species of SEA URCHINS, heart urchins, and sand dollars. A third class, Holothuroidea, comprises about 900 echinoderms known as SEA CUCUMBERS. Echinoderms are used extensively in biological research. (From Barnes, Invertebrate Zoology, 5th ed, pp773-826)Phylogeography: A field of study concerned with the principles and processes governing the geographic distributions of genealogical lineages, especially those within and among closely related species. (Avise, J.C., Phylogeography: The History and Formation of Species. Harvard University Press, 2000)Foraminifera: An order of amoeboid EUKARYOTES characterized by reticulating pseudopods and a complex life cycle with an alternation of generations. Most are less than 1mm in size and found in marine or brackish water.Climate: The longterm manifestations of WEATHER. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Preservation, Biological: The process of protecting various samples of biological material.Feathers: Flat keratinous structures found on the skin surface of birds. Feathers are made partly of a hollow shaft fringed with barbs. They constitute the plumage.Atmosphere: The gaseous envelope surrounding a planet or similar body. (From Random House Unabridged Dictionary, 2d ed)Biofuels: Hydrocarbon-rich byproducts from the non-fossilized BIOMASS that are combusted to generate energy as opposed to fossilized hydrocarbon deposits (FOSSIL FUELS).Greenhouse Effect: The effect of GLOBAL WARMING and the resulting increase in world temperatures. The predicted health effects of such long-term climatic change include increased incidence of respiratory, water-borne, and vector-borne diseases.Marine Biology: The study of the origin, structure, development, growth, function, genetics, and reproduction of organisms which inhabit the OCEANS AND SEAS.South AmericaEnergy-Generating Resources: Materials or phenomena which can provide energy directly or via conversion.Natural History: A former branch of knowledge embracing the study, description, and classification of natural objects (as animals, plants, and minerals) and thus including the modern sciences of zoology, botany, and mineralogy insofar as they existed at that time. In the 17th, 18th, and 19th centuries it was much used for the generalized pursuit of certain areas of science. (Webster, 3d ed; from Dr. James H. Cassedy, NLM History of Medicine Division)Aquatic Organisms: Organisms that live in water.Crustacea: A large subphylum of mostly marine ARTHROPODS containing over 42,000 species. They include familiar arthropods such as lobsters (NEPHROPIDAE), crabs (BRACHYURA), shrimp (PENAEIDAE), and barnacles (THORACICA).Species Specificity: The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.Mollusca: A phylum of the kingdom Metazoa. Mollusca have soft, unsegmented bodies with an anterior head, a dorsal visceral mass, and a ventral foot. Most are encased in a protective calcareous shell. It includes the classes GASTROPODA; BIVALVIA; CEPHALOPODA; Aplacophora; Scaphopoda; Polyplacophora; and Monoplacophora.Bone and Bones: A specialized CONNECTIVE TISSUE that is the main constituent of the SKELETON. The principle cellular component of bone is comprised of OSTEOBLASTS; OSTEOCYTES; and OSTEOCLASTS, while FIBRILLAR COLLAGENS and hydroxyapatite crystals form the BONE MATRIX.Gorilla gorilla: This single species of Gorilla, which is a member of the HOMINIDAE family, is the largest and most powerful of the PRIMATES. It is distributed in isolated scattered populations throughout forests of equatorial Africa.Bayes Theorem: A theorem in probability theory named for Thomas Bayes (1702-1761). In epidemiology, it is used to obtain the probability of disease in a group of people with some characteristic on the basis of the overall rate of that disease and of the likelihood of that characteristic in healthy and diseased individuals. The most familiar application is in clinical decision analysis where it is used for estimating the probability of a particular diagnosis given the appearance of some symptoms or test result.Dominican Republic: A republic in the Greater Antilles in the West Indies. Its capital is Santo Domingo. With Haiti, it forms the island of Hispaniola - the Dominican Republic occupying the eastern two thirds, and Haiti, the western third. It was created in 1844 after a revolt against the rule of President Boyer over the entire island of Hispaniola, itself visited by Columbus in 1492 and settled the next year. Except for a brief period of annexation to Spain (1861-65), it has been independent, though closely associated with the United States. Its name comes from the Spanish Santo Domingo, Holy Sunday, with reference to its discovery on a Sunday. (From Webster's New Geographical Dictionary, 1988, p338, 506 & Room, Brewer's Dictionary of Names, 1992, p151)PrimatesFishes: A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.Jaw: Bony structure of the mouth that holds the teeth. It consists of the MANDIBLE and the MAXILLA.Insects: The class Insecta, in the phylum ARTHROPODA, whose members are characterized by division into three parts: head, thorax, and abdomen. They are the dominant group of animals on earth; several hundred thousand different kinds having been described. Three orders, HEMIPTERA; DIPTERA; and SIPHONAPTERA; are of medical interest in that they cause disease in humans and animals. (From Borror et al., An Introduction to the Study of Insects, 4th ed, p1)Platyrrhini: An infraorder of New World monkeys, comprised of the families AOTIDAE; ATELIDAE; CEBIDAE; and PITHECIIDAE. They are found exclusively in the Americas.Arachnida: A class of Arthropoda that includes SPIDERS; TICKS; MITES; and SCORPIONS.DNA, Mitochondrial: Double-stranded DNA of MITOCHONDRIA. In eukaryotes, the mitochondrial GENOME is circular and codes for ribosomal RNAs, transfer RNAs, and about 10 proteins.Acari: A large, subclass of arachnids comprising the MITES and TICKS, including parasites of plants, animals, and humans, as well as several important disease vectors.Ecology: The branch of science concerned with the interrelationship of organisms and their ENVIRONMENT, especially as manifested by natural cycles and rhythms, community development and structure, interactions between different kinds of organisms, geographic distributions, and population alterations. (Webster's, 3d ed)North AmericaXenarthra: An order of New World mammals characterized by the absence of incisors and canines from among their teeth, and comprising the ARMADILLOS, the SLOTHS, and the anteaters. The order is distinguished from all others by what are known as xenarthrous vertebrae (xenos, strange; arthron, joint): there are secondary, and sometimes even more, articulations between the vertebrae of the lumbar series. The order was formerly called Edentata. (From Random House Unabridged Dictionary, 2d ed; Walker's Mammals of the World, 5th ed, vol. I, p515)Finger Phalanges: Bones that make up the SKELETON of the FINGERS, consisting of two for the THUMB, and three for each of the other fingers.Spheniscidae: The sole family in the order Sphenisciformes, comprised of 17 species of penguins in six genera. They are flightless seabirds of the Southern Hemisphere, highly adapted for marine life.Likelihood Functions: Functions constructed from a statistical model and a set of observed data which give the probability of that data for various values of the unknown model parameters. Those parameter values that maximize the probability are the maximum likelihood estimates of the parameters.Gas, Natural: A combustible, gaseous mixture of low-molecular weight PARAFFIN hydrocarbons, generated below the surface of the earth. It contains mostly METHANE and ETHANE with small amounts of PROPANE; BUTANES; and higher hydrocarbons, and sometimes NITROGEN; CARBON DIOXIDE; HYDROGEN SULFIDE; and HELIUM. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Strepsirhini: A suborder of PRIMATES consisting of the following five families: CHEIROGALEIDAE; Daubentoniidae; Indriidae; LEMURIDAE; and LORISIDAE.Mandible: The largest and strongest bone of the FACE constituting the lower jaw. It supports the lower teeth.Ephedra: A plant genus of the family Ephedraceae, order Ephedrales, class Gnetopsida, division Gnetophyta.Hymenoptera: An extensive order of highly specialized insects including bees, wasps, and ants.Bones of Upper Extremity: The bones of the upper and lower ARM. They include the CLAVICLE and SCAPULA.Pollen: The fertilizing element of plants that contains the male GAMETOPHYTES.Oceans and Seas: A great expanse of continuous bodies of salt water which together cover more than 70 percent of the earth's surface. Seas may be partially or entirely enclosed by land, and are smaller than the five oceans (Atlantic, Pacific, Indian, Arctic, and Antarctic).Conservation of Energy Resources: Planned management, use, and preservation of energy resources.Pan troglodytes: The common chimpanzee, a species of the genus Pan, family HOMINIDAE. It lives in Africa, primarily in the tropical rainforests. There are a number of recognized subspecies.Palaeognathae: A superorder of large, mostly flightless birds, named for their distinctive PALATE morphology. It includes the orders Apterygiformes, Casuriiformes, Dinornithiformes, RHEIFORMES; STRUTHIONIFORMES and Tinamiformes.Ferns: Seedless nonflowering plants of the class Filicinae. They reproduce by spores that appear as dots on the underside of feathery fronds. In earlier classifications the Pteridophyta included the club mosses, horsetails, ferns, and various fossil groups. In more recent classifications, pteridophytes and spermatophytes (seed-bearing plants) are classified in the Subkingdom Tracheobionta (also known as Tracheophyta).Embryophyta: Higher plants that live primarily in terrestrial habitats, although some are secondarily aquatic. Most obtain their energy from PHOTOSYNTHESIS. They comprise the vascular and non-vascular plants.TurtlesAnnonaceae: The custard-apple plant family of the order Magnoliales, subclass Magnoliidae, class Magnoliopsida. Some members provide large pulpy fruits and commercial timber. Leaves and wood are often fragrant. Leaves are simple, with smooth margins, and alternately arranged in two rows along the stems.China: A country spanning from central Asia to the Pacific Ocean.LizardsDugong: A genus of the order Sirenia characterized by a notched tail, the presence of nasal bones and a long nasal cavity, and large columnar teeth lacking enamel. Dugongs inhabit the coastal waters of the Indian Ocean, Red Sea, and the Malay Archipelago. (From Scott, Concise Encyclopedia Biology, 1996)Rodentia: A mammalian order which consists of 29 families and many genera.Plants: Multicellular, eukaryotic life forms of kingdom Plantae (sensu lato), comprising the VIRIDIPLANTAE; RHODOPHYTA; and GLAUCOPHYTA; all of which acquired chloroplasts by direct endosymbiosis of CYANOBACTERIA. They are characterized by a mainly photosynthetic mode of nutrition; essentially unlimited growth at localized regions of cell divisions (MERISTEMS); cellulose within cells providing rigidity; the absence of organs of locomotion; absence of nervous and sensory systems; and an alternation of haploid and diploid generations.Elephants: Large mammals in the family Elephantidae, with columnar limbs, bulky bodies, and elongated snouts. They are the only surviving members of the PROBOSCIDEA MAMMALS.Phthiraptera: An order of small, wingless parasitic insects, commonly known as lice. The suborders include ANOPLURA (sucking lice); AMBLYCERA; ISCHNOCERA; and Rhynchophthirina (elephant and warthog lice).Catarrhini: An infraorder of PRIMATES comprised of the families CERCOPITHECIDAE (old world monkeys); HYLOBATIDAE (siamangs and GIBBONS); and HOMINIDAE (great apes and HUMANS). With the exception of humans, they all live exclusively in Africa and Asia.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Lemur: A genus of the family Lemuridae consisting of five species: L. catta (ring-tailed lemur), L. fulvus, L. macaco (acoumba or black lemur), L. mongoz (mongoose lemur), and L. variegatus (white lemur). Most members of this genus occur in forested areas on Madagascar and the Comoro Islands.Thiotrichaceae: A family of colorless sulfur bacteria in the order Thiotrichales, class GAMMAPROTEOBACTERIA.Cold Climate: A climate characterized by COLD TEMPERATURE for a majority of the time during the year.Tarsiidae: The single family of PRIMATES in the infraorder TARSII, suborder HAPLORHINI. It is comprised of one genus, Tarsius, that inhabits southern Sumatra, Borneo, Sulawesi, and the Philippines.Recycling: The extraction and recovery of usable or valuable material from scrap or other discarded materials. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed.)Ginkgo biloba: The only specie of the genus Ginkgo, family Ginkgoacea. It is the source of extracts of medicinal interest, especially Egb 761. Ginkgo may refer to the genus or species.Whales: Large marine mammals of the order CETACEA. In the past, they were commercially valued for whale oil, for their flesh as human food and in ANIMAL FEED and FERTILIZERS, and for baleen. Today, there is a moratorium on most commercial whaling, as all species are either listed as endangered or threatened.Tomography, X-Ray: Tomography using x-ray transmission.AfricaCalcium Carbonate: Carbonic acid calcium salt (CaCO3). An odorless, tasteless powder or crystal that occurs in nature. It is used therapeutically as a phosphate buffer in hemodialysis patients and as a calcium supplement.Gnetophyta: A plant division of seed plants containing only a few members.Pongo pygmaeus: A species of orangutan, family HOMINIDAE, found in the forests on the island of Borneo.Myanmar: A republic of southeast Asia, northwest of Thailand, long familiar as Burma. Its capital is Yangon, formerly Rangoon. Inhabited by people of Mongolian stock and probably of Tibetan origin, by the 3d century A.D. it was settled by Hindus. The modern Burmese state was founded in the 18th century but was in conflict with the British during the 19th century. Made a crown colony of Great Britain in 1937, it was granted independence in 1947. In 1989 it became Myanmar. The name comes from myanma, meaning the strong, as applied to the Burmese people themselves. (From Webster's New Geographical Dictionary, 1988, p192 & Room, Brewer's Dictionary of Names, 1992, p367)Pan paniscus: The pygmy chimpanzee, a species of the genus Pan, family HOMINIDAE. Its common name is Bonobo, which was once considered a separate genus by some; others considered it a subspecies of PAN TROGLODYTES. Its range is confined to the forests of the central Zaire basin. Despite its name, it is often of equal size to P. troglodytes.ArgentinaAnimal Fins: Membranous appendage of fish and other aquatic organisms used for locomotion or balance.Tooth Attrition: The wearing away of a tooth as a result of tooth-to-tooth contact, as in mastication, occurring only on the occlusal, incisal, and proximal surfaces. It is chiefly associated with aging. It is differentiated from TOOTH ABRASION (the pathologic wearing away of the tooth substance by friction, as brushing, bruxism, clenching, and other mechanical causes) and from TOOTH EROSION (the loss of substance caused by chemical action without bacterial action). (Jablonski, Dictionary of Dentistry, 1992, p86)Cytochromes b: Cytochromes of the b group that have alpha-band absorption of 563-564 nm. They occur as subunits in MITOCHONDRIAL ELECTRON TRANSPORT COMPLEX III.Humerus: Bone in humans and primates extending from the SHOULDER JOINT to the ELBOW JOINT.Clethraceae: A plant family of the order Ericales, subclass Dilleniidae, class Magnoliopsida.Sharks: A group of elongate elasmobranchs. Sharks are mostly marine fish, with certain species large and voracious.Synchrotrons: Devices for accelerating protons or electrons in closed orbits where the accelerating voltage and magnetic field strength varies (the accelerating voltage is held constant for electrons) in order to keep the orbit radius constant.Pinaceae: A plant family of the order Pinales, class Pinopsida, division Coniferophyta, known for the various conifers.Sequence Analysis, DNA: A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis.Carnivora: An order of MAMMALS, usually flesh eaters with appropriate dentition. Suborders include the terrestrial carnivores Fissipedia, and the aquatic carnivores PINNIPEDIA.Adaptation, Biological: Changes in biological features that help an organism cope with its ENVIRONMENT. These changes include physiological (ADAPTATION, PHYSIOLOGICAL), phenotypic and genetic changes.Cebidae: A family of New World monkeys in the infraorder PLATYRRHINI, consisting of nine subfamilies: ALOUATTINAE; AOTINAE; Atelinae; Callicebinae; CALLIMICONINAE; CALLITRICHINAE; CEBINAE; Pithecinae; and SAIMIRINAE. They inhabit the forests of South and Central America, comprising the largest family of South American monkeys.Lycopodiaceae: The club-moss plant family of the order Lycopodiales, class Lycopodiopsida, division Lycopodiophyta, subkingdom Tracheobionta. The common name of clubmoss applies to several genera of this family. Despite the name this is not one of the true mosses (BRYOPSIDA).Carex Plant: A plant genus of the family CYPERACEAE. The seed contains oligostilbenes (STILBENES).Annelida: A phylum of metazoan invertebrates comprising the segmented worms, and including marine annelids (POLYCHAETA), freshwater annelids, earthworms (OLIGOCHAETA), and LEECHES. Only the leeches are of medical interest. (Dorland, 27th ed)Actinidiaceae: A plant family of the order Theales, subclass Dilleniidae, class Magnoliopsida. It is best known for Kiwi fruit (ACTINIDIA).Eukaryota: One of the three domains of life (the others being BACTERIA and ARCHAEA), also called Eukarya. These are organisms whose cells are enclosed in membranes and possess a nucleus. They comprise almost all multicellular and many unicellular organisms, and are traditionally divided into groups (sometimes called kingdoms) including ANIMALS; PLANTS; FUNGI; and various algae and other taxa that were previously part of the old kingdom Protista.Trees: Woody, usually tall, perennial higher plants (Angiosperms, Gymnosperms, and some Pterophyta) having usually a main stem and numerous branches.Metacarpal Bones: The five cylindrical bones of the METACARPUS, articulating with the CARPAL BONES proximally and the PHALANGES OF FINGERS distally.Petroleum: Naturally occurring complex liquid hydrocarbons which, after distillation, yield combustible fuels, petrochemicals, and lubricants.Dental Enamel: A hard thin translucent layer of calcified substance which envelops and protects the dentin of the crown of the tooth. It is the hardest substance in the body and is almost entirely composed of calcium salts. Under the microscope, it is composed of thin rods (enamel prisms) held together by cementing substance, and surrounded by an enamel sheath. (From Jablonski, Dictionary of Dentistry, 1992, p286)Locomotion: Movement or the ability to move from one place or another. It can refer to humans, vertebrate or invertebrate animals, and microorganisms.Molar: The most posterior teeth on either side of the jaw, totaling eight in the deciduous dentition (2 on each side, upper and lower), and usually 12 in the permanent dentition (three on each side, upper and lower). They are grinding teeth, having large crowns and broad chewing surfaces. (Jablonski, Dictionary of Dentistry, 1992, p821)Biogenesis: The origin of life. It includes studies of the potential basis for life in organic compounds but excludes studies of the development of altered forms of life through mutation and natural selection, which is BIOLOGICAL EVOLUTION.Environment: The external elements and conditions which surround, influence, and affect the life and development of an organism or population.Microscopy, Electron, Scanning: Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.Stramenopiles: A common name (but used formally) for a group of organisms that are mostly kinds of algae including BACILLARIOPHYTA; OOMYCETES; PHAEOPHYCEAE; and CHRYSOPHYCEAE. They all contain CHLOROPLASTS that are thought to have been derived from the endosymbiosis of ancient RED ALGAE.Marsupialia: An infraclass of MAMMALS, also called Metatheria, where the young are born at an early stage of development and continue to develop in a pouch (marsupium). In contrast to Eutheria (placentals), marsupials have an incomplete PLACENTA.Bahamas: A chain of islands, cays, and reefs in the West Indies, lying southeast of Florida and north of Cuba. It is an independent state, called also the Commonwealth of the Bahamas or the Bahama Islands. The name likely represents the local name Guanahani, itself of uncertain origin. (From Webster's New Geographical Dictionary, 1988, p106 & Room, Brewer's Dictionary of Names, 1992, p45)Plant Leaves: Expanded structures, usually green, of vascular plants, characteristically consisting of a bladelike expansion attached to a stem, and functioning as the principal organ of photosynthesis and transpiration. (American Heritage Dictionary, 2d ed)Models, Genetic: Theoretical representations that simulate the behavior or activity of genetic processes or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.Carbon Cycle: The cycle by which the element carbon is exchanged between organic matter and the earth's physical environment.Calibration: Determination, by measurement or comparison with a standard, of the correct value of each scale reading on a meter or other measuring instrument; or determination of the settings of a control device that correspond to particular values of voltage, current, frequency or other output.Antarctic Regions: The continent lying around the South Pole and the southern waters of the Atlantic, Pacific, and Indian Oceans. It includes the Falkland Islands Dependencies. (From Webster's New Geographical Dictionary, 1988, p55)Madagascar: One of the Indian Ocean Islands off the southeast coast of Africa. Its capital is Antananarivo. It was formerly called the Malagasy Republic. Discovered by the Portuguese in 1500, its history has been tied predominantly to the French, becoming a French protectorate in 1882, a French colony in 1896, and a territory within the French union in 1946. The Malagasy Republic was established in the French Community in 1958 but it achieved independence in 1960. Its name was changed to Madagascar in 1975. (From Webster's New Geographical Dictionary, 1988, p714)Cycadophyta: A division of GYMNOSPERMS which look like palm trees (ARECACEAE) but are more closely related to PINUS. They have large cones and large pinnate leaves and are sometimes called cycads, a term which may also refer more narrowly to cycadales or CYCAS.Fuel Oils: Complex petroleum hydrocarbons consisting mainly of residues from crude oil distillation. These liquid products include heating oils, stove oils, and furnace oils and are burned to generate energy.Sporangia: A structure found in plants, fungi, and algae, that produces and contains spores.Bermuda: A British colony in the western North Atlantic Ocean about 640 miles east southeast of Cape Hatteras, North Carolina. It comprises a group of about 300 islands of which only about 20 are inhabited. It is called also the Bermuda Islands or the Bermudas. It was named for the Spanish explorer Juan Bermudez who visited the islands in 1515. (From Webster's New Geographical Dictionary, 1988, p140 & Room, Brewer's Dictionary of Names, 1992, p61)Gastropoda: A class in the phylum MOLLUSCA comprised of SNAILS and slugs. The former have coiled external shells and the latter usually lack shells.Tarsal Bones: The seven bones which form the tarsus - namely, CALCANEUS; TALUS; cuboid, navicular, and the internal, middle, and external cuneiforms.Polyplacophora: A class in the phylum MOLLUSCA comprised of flattened, elongated marine mollusks, commonly called chitons. They are unique in that they possess seven or eight separate shell plates.Cnidaria: A phylum of radially symmetrical invertebrates characterized by possession of stinging cells called nematocysts. It includes the classes ANTHOZOA; CUBOZOA; HYDROZOA, and SCYPHOZOA. Members carry CNIDARIAN VENOMS.Georgia (Republic)Genetic Variation: Genotypic differences observed among individuals in a population.Predatory Behavior: Instinctual behavior pattern in which food is obtained by killing and consuming other species.Nymphaeaceae: The sour gum plant family of the order Nymphaeales, subclass Magnoliidae, class Magnoliopsida. All have horizontal or hanging branches and broad alternate leaves, and they are dioecious (male and female flowers on different plants).Models, Biological: Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.Mongolia: The country is bordered by RUSSIA on the north and CHINA on the west, south, and east. The capita is Ulaanbaatar.Biomass: Total mass of all the organisms of a given type and/or in a given area. (From Concise Dictionary of Biology, 1990) It includes the yield of vegetative mass produced from any given crop.Urodela: An order of the Amphibia class which includes salamanders and newts. They are characterized by usually having slim bodies and tails, four limbs of about equal size (except in Sirenidae), and a reduction in skull bones.Extraction and Processing Industry: The industry concerned with the removal of raw materials from the Earth's crust and with their conversion into refined products.Oxygen Isotopes: Stable oxygen atoms that have the same atomic number as the element oxygen, but differ in atomic weight. O-17 and 18 are stable oxygen isotopes.Volcanic Eruptions: The ash, dust, gases, and lava released by volcanic explosion. The gases are volatile matter composed principally of about 90% water vapor, and carbon dioxide, sulfur dioxide, hydrogen, carbon monoxide, and nitrogen. The ash or dust is pyroclastic ejecta and lava is molten extrusive material consisting mainly of magnesium silicate. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Ursidae: The family of carnivorous or omnivorous bears, having massive bodies, coarse heavy fur, relatively short limbs, and almost rudimentary tails.Population Dynamics: The pattern of any process, or the interrelationship of phenomena, which affects growth or change within a population.Mediterranean Islands: Scattered islands in the Mediterranean Sea. The chief islands are the Balearic Islands (belong to Spain; Majorca and Minorca are among these), Corsica (belongs to France), Crete (belongs to Greece), CYPRUS (a republic), the Cyclades, Dodecanese and Ionian Islands (belong to Greece), MALTA (a republic), Sardinia and SICILY (belong to Italy). (From Webster's New Geographical Dictionary, 1988, p747)Snakes: Limbless REPTILES of the suborder Serpentes.Felidae: The cat family in the order CARNIVORA comprised of muscular, deep-chested terrestrial carnivores with a highly predatory lifestyle.Molecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.Climate Change: Any significant change in measures of climate (such as temperature, precipitation, or wind) lasting for an extended period (decades or longer). It may result from natural factors such as changes in the sun's intensity, natural processes within the climate system such as changes in ocean circulation, or human activities.Polygonaceae: The only family of the buckwheat order (Polygonales) of dicotyledonous flowering plants. It has 40 genera of herbs, shrubs, and trees.Bivalvia: A class in the phylum MOLLUSCA comprised of mussels; clams; OYSTERS; COCKLES; and SCALLOPS. They are characterized by a bilaterally symmetrical hinged shell and a muscular foot used for burrowing and anchoring.Eucalyptus: A genus of trees of the Myrtaceae family, native to Australia, that yields gums, oils, and resins which are used as flavoring agents, astringents, and aromatics.Carbon: A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.Wood: A product of hard secondary xylem composed of CELLULOSE, hemicellulose, and LIGNANS, that is under the bark of trees and shrubs. It is used in construction and as a source of CHARCOAL and many other products.Siberia: A region, north-central Asia, largely in Russia. It extends from the Ural Mountains to the Pacific Ocean and from the Arctic Ocean to central Kazakhstan and the borders of China and Mongolia.Global Warming: Increase in the temperature of the atmosphere near the Earth's surface and in the troposphere, which can contribute to changes in global climate patterns.Africa, Eastern: The geographical area of Africa comprising BURUNDI; DJIBOUTI; ETHIOPIA; KENYA; RWANDA; SOMALIA; SUDAN; TANZANIA; and UGANDA.Indonesia: A republic stretching from the Indian Ocean east to New Guinea, comprising six main islands: Java, Sumatra, Bali, Kalimantan (the Indonesian portion of the island of Borneo), Sulawesi (formerly known as the Celebes) and Irian Jaya (the western part of New Guinea). Its capital is Djakarta. The ethnic groups living there are largely Chinese, Arab, Eurasian, Indian, and Pakistani; 85% of the peoples are of the Islamic faith.Seed Dispersal: The various physical methods which include wind, insects, animals, tension, and water, by which a plant scatters its seeds away from the parent plant.MontanaFeeding Behavior: Behavioral responses or sequences associated with eating including modes of feeding, rhythmic patterns of eating, and time intervals.GreenlandCranial Sinuses: Large endothelium-lined venous channels situated between the two layers of DURA MATER, the endosteal and the meningeal layers. They are devoid of valves and are parts of the venous system of dura mater. Major cranial sinuses include a postero-superior group (such as superior sagittal, inferior sagittal, straight, transverse, and occipital) and an antero-inferior group (such as cavernous, petrosal, and basilar plexus).Cercopithecidae: The family of Old World monkeys and baboons consisting of two subfamilies: CERCOPITHECINAE and COLOBINAE. They are found in Africa and part of Asia.Carbon Dioxide: A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.Wing

Evolutionary and preservational constraints on origins of biologic groups: divergence times of eutherian mammals. (1/2344)

Some molecular clock estimates of divergence times of taxonomic groups undergoing evolutionary radiation are much older than the groups' first observed fossil record. Mathematical models of branching evolution are used to estimate the maximal rate of fossil preservation consistent with a postulated missing history, given the sum of species durations implied by early origins under a range of species origination and extinction rates. The plausibility of postulated divergence times depends on origination, extinction, and preservation rates estimated from the fossil record. For eutherian mammals, this approach suggests that it is unlikely that many modern orders arose much earlier than their oldest fossil records.  (+info)

X chromosome evidence for ancient human histories. (2/2344)

Diverse African and non-African samples of the X-linked PDHA1 (pyruvate dehydrogenase E1 alpha subunit) locus revealed a fixed DNA sequence difference between the two sample groups. The age of onset of population subdivision appears to be about 200 thousand years ago. This predates the earliest modern human fossils, suggesting the transformation to modern humans occurred in a subdivided population. The base of the PDHA1 gene tree is relatively ancient, with an estimated age of 1.86 million years, a late Pliocene time associated with early species of Homo. PDHA1 revealed very low variation among non-Africans, but in other respects the data are consistent with reports from other X-linked and autosomal haplotype data sets. Like these other genes, but in conflict with microsatellite and mitochondrial data, PDHA1 does not show evidence of human population expansion.  (+info)

Predicting protein decomposition: the case of aspartic-acid racemization kinetics. (3/2344)

The increase in proportion of the non-biological (D-) isomer of aspartic acid (Asp) relative to the L-isomer has been widely used in archaeology and geochemistry as a tool for dating. the method has proved controversial, particularly when used for bones. The non-linear kinetics of Asp racemization have prompted a number of suggestions as to the underlying mechanism(s) and have led to the use of mathematical transformations which linearize the increase in D-Asp with respect to time. Using one example, a suggestion that the initial rapid phase of Asp racemization is due to a contribution from asparagine (Asn), we demonstrate how a simple model of the degradation and racemization of Asn can be used to predict the observed kinetics. A more complex model of peptide bound Asx (Asn + Asp) racemization, which occurs via the formation of a cyclic succinimide (Asu), can be used to correctly predict Asx racemization kinetics in proteins at high temperatures (95-140 degrees C). The model fails to predict racemization kinetics in dentine collagen at 37 degrees C. The reason for this is that Asu formation is highly conformation dependent and is predicted to occur extremely slowly in triple helical collagen. As conformation strongly influences the rate of Asu formation and hence Asx racemization, the use of extrapolation from high temperatures to estimate racemization kinetics of Asx in proteins below their denaturation temperature is called into question. In the case of archaeological bone, we argue that the D:L ratio of Asx reflects the proportion of non-helical to helical collagen, overlain by the effects of leaching of more soluble (and conformationally unconstrained) peptides. Thus, racemization kinetics in bone are potentially unpredictable, and the proposed use of Asx racemization to estimate the extent of DNA depurination in archaeological bones is challenged.  (+info)

Preservation of key biomolecules in the fossil record: current knowledge and future challenges. (4/2344)

We have developed a model based on the analyses of modern and Pleistocene eggshells and mammalian bones which can be used to understand the preservation of amino acids and other important biomolecules such as DNA in fossil specimens. The model is based on the following series of diagenetic reactions and processes involving amino acids: the hydrolysis of proteins and the subsequent loss of hydrolysis products from the fossil matrix with increasing geologic age; the racemization of amino acids which produces totally racemized amino acids in 10(5)-10(6) years in most environments on the Earth; the introduction of contaminants into the fossil that lowers the enantiomeric (D:L) ratios produced via racemization; and the condensation reactions between amino acids, as well as other compounds with primary amino groups, and sugars which yield humic acid-like polymers. This model was used to evaluate whether useful amino acid and DNA sequence information is preserved in a variety of human, amber-entombed insect and dinosaur specimens. Most skeletal remains of evolutionary interest with respect to the origin of modern humans are unlikely to preserve useful biomolecular information although those from high latitude sites may be an exception. Amber-entombed insects contain well-preserved unracemized amino acids, apparently because of the anhydrous nature of the amber matrix, and thus may contain DNA fragments which have retained meaningful genetic information. Dinosaur specimens contain mainly exogenous amino acids, although traces of endogenous amino acids may be present in some cases. Future ancient biomolecule research which takes advantage of new methologies involving, for example, humic acid cleaving reagents and microchip-based DNA-protein detection and sequencing, along with investigations of very slow biomolecule diagenetic reactions such as the racemization of isoleucine at the beta-carbon, will lead to further enhancements of our understanding of biomolecule preservation in the fossil record.  (+info)

Early medieval cattle remains from a Scandinavian settlement in Dublin: genetic analysis and comparison with extant breeds. (5/2344)

A panel of cattle bones excavated from the 1000-year-old Viking Fishamble Street site in Dublin was assessed for the presence of surviving mitochondrial DNA (mtDNA). Eleven of these bones gave amplifiable mtDNA and a portion of the hypervariable control region was determined for each specimen. A comparative analysis was performed with control region sequences from five extant Nordic and Irish cattle breeds. The medieval population displayed similar levels of mtDNA diversity to modern European breeds. However, a number of novel mtDNA haplotypes were also detected in these bone samples. In addition, the presence of a putative ancestral sequence at high frequency in the medieval population supports an early post-domestication expansion of cattle in Europe.  (+info)

New evidence from Le Moustier 1: computer-assisted reconstruction and morphometry of the skull. (6/2344)

In this study, we present a new computerized reconstruction of the Le Moustier 1 Neanderthal skull and discuss its significance for Neanderthal growth and variability. Because of the precarious state of preservation of the original material, we applied entirely noninvasive methods of fossil reconstruction and morphometry, using a combination of computed tomography, computer graphics, and stereolithography. After electronic restoration, the isolated original pieces were recomposed on the computer screen using external and internal anatomical clues to position the bone fragments and mirror images to complete missing parts. The inferred effects of general compressive deformation that occurred during fossilization were corrected by virtual decompression of the skull. The resulting new reconstruction of the Le Moustier 1 skull shows morphologic features close to the typical Neanderthal adult state. Residual asymmetry of skeletal parts can be traced to in vivo skeletal modification: the left mandibular joint shows signs of a healed condylar fracture, and the anatomy of the occipital region suggests mild plagiocephaly. Using micro-CT analysis, the left incus could be recovered from the matrix filling of the middle ear cavity. Its morphometric dimensions are similar to those of the La Ferrassie III incus. The morphometric characteristics of the inner ear deviate substantially from the condition reported as typical for Neanderthals and fall within the range of modern human variability.  (+info)

Evolutionary patterns from mass originations and mass extinctions. (7/2344)

The Fossil Record 2 database gives a stratigraphic range of most known animal and plant families. We have used it to plot the number of families extant through time and argue for an exponential fit, rather than a logistic one, on the basis of power spectra of the residuals from the exponential. The times of origins and extinctions, when plotted for all families of marine and terrestrial organisms over the last 600 Myr, reveal different origination and extinction peaks. This suggests that patterns of biological evolution are driven by its own internal dynamics as well as responding to upsets from external causes. Spectral analysis shows that the residuals from the exponential model of the marine system are more consistent with 1/f noise suggesting that self-organized criticality phenomena may be involved.  (+info)

Environment and behavior of 2.5-million-year-old Bouri hominids. (8/2344)

The Hata Member of the Bouri Formation is defined for Pliocene sedimentary outcrops in the Middle Awash Valley, Ethiopia. The Hata Member is dated to 2.5 million years ago and has produced a new species of Australopithecus and hominid postcranial remains not currently assigned to species. Spatially associated zooarchaeological remains show that hominids acquired meat and marrow by 2.5 million years ago and that they are the near contemporary of Oldowan artifacts at nearby Gona. The combined evidence suggests that behavioral changes associated with lithic technology and enhanced carnivory may have been coincident with the emergence of the Homo clade from Australopithecus afarensis in eastern Africa.  (+info)

  • Beach Fossils are playing a free show at Terminal 5 on July 7 with Nothing, Sheer Mag and Dark Thoughts. (brooklynvegan.com)
  • Los Angeles art-punks Hit Bargain, which feature members of These Are Powers, The Pains of Being Pure at Heart, Cold Beat, North Highlands, and Beach Fossils, released their debut album, 'Potential Maximizer,' today. (brooklynvegan.com)
  • The 25-minute documentary features interviews with Todd P, Beach Fossils, Frankie Cosmos, City Councilman Rafael Espinal, and more. (brooklynvegan.com)
  • Beach Fossils were in the Halloween spirit at NYC's Brooklyn Steel for their "sacrificial ritual spectacular" on Saturday night (10/28) which was also the final date of their tour . (brooklynvegan.com)
  • This week's episode focuses on The Growlers Six festival with songs from Yeah Yeah Yeahs, Butthole Surfers, Danny Brown, Beach Fossils, The B-52s, Ariel Pink, Jonanthan Richman, Bad Brains, Beth Ditto and more. (brooklynvegan.com)
  • Diffuse Brooklyn guitar-twinklers Beach Fossils released their pretty great self-titled debut in 2010, and they've since spun off side projects like DIIV and Heavenly Beat. (stereogum.com)
  • Beach Fossils are an American indie rock band from Brooklyn, New York, formed in 2009. (wikipedia.org)
  • In 2016, Beach Fossils starred in supporting roles in the HBO television series, Vinyl. (wikipedia.org)
  • Gardner has been part of Beach Fossils since 2011. (wikipedia.org)
  • Studio albums Beach Fossils (2010) Clash the Truth (2013) Somersault (2017) EPs "What a Pleasure" (2011) Singles "Daydream" (2010) "Face It" (2010) "Careless" (2012) "Shallow" (2012) "Sugar" (2017) Reges, Margaret. (wikipedia.org)
  • An explanation of how scientists find and use fossils to study prehistoric animals is also given. (scholastic.com)
  • Fossils like this are called trace fossils and can be very useful as they give scientists an insight into how the dinosaur lived. (factmonster.com)
  • Only a minute fraction of the Earth's creatures ever have their remains fossilised for future scientists and only a small fraction of fossil-bearing rocks are exposed. (newscientist.com)
  • However, radiometric dating is not a reliable method of dating fossils, and is rejected by creationary scientists. (conservapedia.com)
  • Scientists reported Sunday the discovery in Antarctica of 225 million-year- old fossil bones of amphibians and reptiles, indicating that animals existed on the bottom of the world longer than previously thought. (sun-sentinel.com)
  • microscopic proteins that had never been used on fossils before.Scientists stu. (neatorama.com)
  • By correlating fossils from various parts of the world, scientists are able to give relative ages to particular strata. (uen.org)
  • The workshop will be technical in scope with short presentations from scientists that have done research in Fossil Creek surrounding topics such as recreation, wildlife and fisheries, and aquatic ecology. (google.com)
  • Scientists have discovered what they believe is the oldest known lemur fossils in the Bugti Hills of central Pakistan. (nationalgeographic.com)
  • Mysterious fossils of what may be a previously unknown type of human have been uncovered in caves in China, ones that possess a highly unusual mix of bygone and modern human features, scientists reveal. (yahoo.com)
  • It stayed encased in a block of rock neglected in the basement of an archaeological research institute until 2009, when the international team of scientists rediscovered the fossils. (yahoo.com)
  • Scientists can use the relationships between fossils of different periods to support the theory of evolution . (howstuffworks.com)
  • Scientists can also use fossils to identify species of plants and animals that exist today. (howstuffworks.com)
  • These and other fossils have made massive contributions to life on Earth, and scientists continue to make new discoveries. (howstuffworks.com)
  • In a land where mountains meet an ancient seabed, scientists discovered a treasure trove of fossils from the Jurassic Period. (prweb.com)
  • Dozens of scientists spent the last three months searching and digging for fossils and now some of the scientific riches they unearthed are making their way to their new home at The Children's Museum of Indianapolis in Indiana. (prweb.com)
  • Scientists also discovered thousands of fossils known as Devil's Toenails that are mollusks, dolphin-like creatures with eyes as big as dinner plates called ichthyosaurs and dinosaur trackways. (prweb.com)
  • A 20-year-lease procured by The Children's Museum will allow scientists to return to The Jurassic Mile site in Wyoming over the next several years to dig for any remaining fossils. (prweb.com)
  • As there are thousands of fossils, mostly fragmentary, often consisting of single bones or isolated teeth with complete skulls and skeletons rare, this overview is not complete, but does show some of the most important finds. (wikipedia.org)
  • For six decades and three generations, the Leakey family has collected thousands of fossils of human ancestors and other animals, as well as stone tools and other artifacts that are stored permanently in the National Museums of Kenya and at the Turkana Basin Institute . (makezine.com)
  • Because of their shells, the fossils of nautiluses are easier to come by than remains of other cephalopods, and fossil hunters have discovered ancient shells dating back at least 500 million years . (treehugger.com)
  • The number here in Washington is (800) 989-8255, (800) 989-TALK to join the conversation with Pulitzer Prize-winning journalist Lew Simons, Lewis Simons, who has joined two very different fossil hunters on the trail of hetivines(ph), and his article appears in the May issue of National Geographic magazine. (npr.org)
  • Reproduced from a free print publication of the U.S. Geological Survey, this online booklet is a marvelous introduction, in non-technical language, to how geologists study fossils to learn about the earth's history. (surfnetkids.com)
  • If you study fossils, what's your opinion about the commercial side? (npr.org)
  • The following tables give an overview of notable finds of hominin fossils and remains relating to human evolution , beginning with the formation of the tribe Hominini (the divergence of the human and chimpanzee lineages ) in the late Miocene , roughly 7 to 8 million years ago. (wikipedia.org)
  • Chinese fossils change the way we look at the evolution of birds. (abc.net.au)
  • One might ask, "how do you choose 25 fossils, among so many choices, to represent evolution? (scienceblogs.com)
  • Don selected fossils using several criteria, but one basis for his choice was the availability of rich historical information about a fossil's discovery, interpretation, and effect on our thinking about evolution. (scienceblogs.com)
  • The work is edied by Steve Parker, but authored by nearly a dozen experts in various subfields of fossils and evolution, so it is authoritative and scholarly. (scienceblogs.com)
  • How can fossils help biologists study evolution? (answers.com)
  • FOSSIL animals discovered in some 540-million-year-old Arctic rocks may force biologists to rethink their ideas about the evolution of invertebrates. (newscientist.com)
  • Do Pakistan Fossils Alter Path of Lemur Evolution? (nationalgeographic.com)
  • The absence of fossil evidence for intermediary stages between major transitions in organic design, indeed our inability, even in our imagination, to construct functional intermediates in many cases, has been a persistent and nagging problem for gradualistic accounts of evolution. (yahoo.com)
  • Transitional fossils , or fossils that display the characteristics of more than one type of animal, can also support the theory of evolution. (howstuffworks.com)
  • The fossils, which were discovered on the Tibetan plateau , belong to a sister species of the snow leopard that prowls the Himalayan region today, said study co-author Zhijie Jack Tseng, a paleontologist at the American Museum of Natural History in New York. (yahoo.com)
  • The newly-named species left fossils that indicate it was a land predator that ate din. (neatorama.com)
  • This is a fossil of an ancient dragonfly of the Libellulium species. (liverpoolmuseums.org.uk)
  • These new fossils might be of a previously unknown species, one that survived until the very end of the ice age around 11,000 years ago," said researcher Darren Curnoe, a palaeoanthropologist at the University of New South Wales in Australia. (yahoo.com)
  • New species of fossil worm with a big bite, discovered in the Burgess Shale. (rom.on.ca)
  • When researchers look at a layer of rock, they look at all the fossils contained there, determining which species lived at the same time. (howstuffworks.com)
  • This replica fossil of a 90-million-year-old leaf specimen was used to help identify the Woollemi pine, an old, rare species of pine tree. (howstuffworks.com)
  • Researchers identified the species of pine tree shown at the right with the help of a 90-million-year-old fossil impression. (howstuffworks.com)
  • Cast in concrete, the specimens rang from the cassette tape (Latin name Asportatio acroamatis ) to the guts of an iPod ( Egosiliqua malusymphonicus ) - my favorite because it actually looks a little like a real fossil. (wired.com)
  • At least three fossil specimens were uncovered in 1989 by miners quarrying limestone at Maludong or Red Deer Cave near the city of Mengzi in southwest China. (yahoo.com)
  • Fossil specimens reveal many human-like ancestors that lived millions of years ago. (howstuffworks.com)
  • The 18-million-year-old Thomas Farm fossil preserve, owned by the University of Florida, has produced tens of thousands of bones of extinct vertebrates. (surfnetkids.com)
  • Christopher Lock's Modern Fossils portray the gadgets of yesteryear as extinct, long-lost creatures, fossilized to pique the curiosity of future generations. (wired.com)
  • The fossil record helps to predict which kinds of animals are more likely to go extinct. (eurekalert.org)
  • Just as some groups of people are more prone to health problems like diabetes or heart disease, we can tell from the fossil record which groups of animals are naturally more likely to go extinct," said Aaron O'Dea, paleontologist at the Smithsonian Tropical Research Institute. (eurekalert.org)
  • A more likely explanation, says paleontologist Richard Kay, also of Duke University, is that the fossil teeth belong to a family of Eurasian primates sivaladapis that are now extinct. (nationalgeographic.com)
  • Searching for fossils is like traveling back in time to get a peek at Earth's past. (amnh.org)
  • Fossil fuels are the product of millions of years of earth's natural processes. (treehugger.com)
  • We'll start with a look at two of the processes that are central to fossil formation -- building up the Earth's layers and breaking down its waste. (howstuffworks.com)
  • Let children make fossils to help them understand that Earth's resources have been around a long time and should be protected. (educationworld.com)
  • Because the Earth's magnetic poles have flipped at known points in geologic time, counting the number of times magnetic particles switch orientation in nearby rocks can reveal the approximate age of a fossil. (yahoo.com)
  • After successfully completing this exercise, students will be able to sketch slices through a few invertebrate fossils at a variety of angles, and will be able to recognize randomly oriented slices through these same fossils. (carleton.edu)
  • This activity is used to review invertebrate fossils in preparation for a practical. (carleton.edu)
  • The spectacular vertebrate fossils preserved within the White River Badlands have been studied extensively since 1846 and are included in museum collections throughout the world. (nps.gov)
  • Visit the Paleontolgy lab where vertebrate fossil preparator Akiko Shinya works on fossils. (fieldmuseum.org)
  • The first thematic paleontological resource inventory accomplished was an inventory of fossil vertebrate tracks from NPS areas (Santucci et al. (nps.gov)
  • 1998). Through this thematic inventory, a total of nineteen NPS units were identified as preserving fossil vertebrate tracks. (nps.gov)
  • Subsequent discoveries have increased the number of parks identified with fossil vertebrate tracks to twenty-five (Santucci et al. (nps.gov)
  • Many living fossils alive today have bizarre, eccentric traits that make them seem more like aliens than anything from this world. (treehugger.com)
  • This slide presentation reveals the variety of forms that fossils take, as well as examples of the kinds of life whose remains have been preserved. (curriki.org)
  • Fossils are preserved remains of once-living organisms. (conservapedia.com)
  • Carbon dating can only be used if carbon remains, which is not the case with most fossils. (conservapedia.com)
  • It describes the fossil remains of an animal unearthed in China's northeast Liaoning Province, which has produced so many stunning fossils in recent years. (bbc.co.uk)
  • Archaeoraptor was soon dubbed the 'Piltdown bird' and the 'Piltdown chicken' by the press, in reference to the biggest fossil hoax of all time, in which faked remains of putative early hominids were dug up from Piltdown in England in 1912. (scientificamerican.com)
  • Discovered as recently as 2003, this living fossil has been described by researchers as a 'bloated doughnut with stubby legs and a pointy snout. (treehugger.com)
  • Our geological collections of fossils and meteorites are world renowned, drawing researchers from around the globe. (fieldmuseum.org)
  • The Field Museum collections of fossils and meteorites are world renowned, drawing researchers from around the globe to study them. (fieldmuseum.org)
  • The team didn't know how old the fossils were, so the researchers looked at the orientation of magnetic minerals in the rock layers around the fossils. (yahoo.com)
  • Researchers from the University of Zurich studied six types of pollen fossils carefully and claimed they were 240 million years old. (answersingenesis.org)
  • And fossils can even help researchers understand human life. (howstuffworks.com)
  • They identify, visualize, and sketch slices through a variety of shelly organisms, then apply what they've learned to identify fossils in several samples of coquina. (carleton.edu)
  • For this reason, only a fraction of the organisms that have existed on Earth appear in the fossil record , or the combined total of the fossils discovered on Earth and the information learned from them. (howstuffworks.com)
  • Fossils are remnants or impressions of ancient organisms that are naturally preserved in stone. (nationalgeographic.com)
  • facies fossil Fossil organisms that are restricted to particular lithologies , reflecting the original environments of deposition. (encyclopedia.com)
  • This is 100,000 years older than previously discovered fossils of Homo sapiens that have been securely dated. (cnn.com)
  • Most of the early fossils shown are not considered direct ancestors to Homo sapiens but are closely related to direct ancestors and are therefore important to the study of the lineage. (wikipedia.org)
  • After 1.5 million years ago (extinction of Paranthropus ), all fossils shown are human (genus Homo ). (wikipedia.org)
  • After 11,500 years ago (11.5 ka, beginning of the Holocene ), all fossils shown are Homo sapiens ( anatomically modern humans ), illustrating recent divergence in the formation of modern human sub-populations . (wikipedia.org)
  • Fossils opens with Julie describing her parents as "Homo parentithicus. (wikipedia.org)
  • To show how widespread dinosaur fossils have been in the UK, mapping and analytics company Esri UK plotted the location of each and every dinosaur fossil find here, from the south coast to the Scottish Highlands. (telegraph.co.uk)
  • Aware of the general inaccessibility of these national treasures in their current locations, Dr. Louise Leakey , a third generation of the 'fossil hunter' family, took it upon herself to find a way to make them globally accessible for educators, kids, and science enthusiasts. (makezine.com)
  • Some examples of non examples of fossils are as follows: knobby rocks, beautiful stones, bones. (answers.com)
  • rmor, and even individual scales of its skin were fossilized as well as its bones.The remarkable fossil is. (neatorama.com)
  • But, most importantly, the Juramaia fossil also retains a full set of teeth and forepaw bones. (bbc.co.uk)
  • The fall haul of fossils is brimming with the ancient bones of long-necked, long-tailed beasts, some of which are believed to be 80-foot-long plant-eating sauropods, smaller meat-eating predator called theropods and preserved plant life. (prweb.com)
  • Manning went on to say that it is extremely rare to find so many bones, tracks and fossil plants all within a single site. (prweb.com)
  • Scientist Greg Davies uncovers fossils in a block of sediment from beneath the Academy Museum. (nypost.com)
  • Scientist Dr Nicola Stern holds a fossil in front of her face while school students look on at Lake Mungo. (abc.net.au)
  • Its fossils have been discovered in Africa, India , and Antarctica . (britannica.com)
  • continental drift In this map depicting a portion of Gondwana (an ancient supercontinent that once contained South America, Africa, Australia, India, and Antarctica), the discovery of fossil plants and animals whose geographic home ranges cut across the greater landmass is supporting evidence for continental drift. (britannica.com)
  • Fossil discoveries in Africa indicate that early human ancestors appeared about three million years ago. (nytimes.com)
  • A living fossil is an organism that has retained the same form over millions of years, has few or no living relatives, and represents a sole surviving lineage from an epoch long past. (treehugger.com)
  • The earliest known big cat lived in what is now China between 5.9 million and 4.1 million years ago, newfound fossils of the ancient prowler suggest. (yahoo.com)
  • The earliest fossil bat is already a complete functional unit, very similar to the bats we have today. (ldolphin.org)
  • The fossils, including a partial skull and a lower jaw, belong to five different individuals including three young adults, an adolescent and a child estimated to be 8 years old. (cnn.com)
  • Tseng and his colleagues were excavating a rocky region of badlands in the Tibetan plateau in 2010 when they uncovered a fossil skull and one other bone that seemed to belong to a big cat. (yahoo.com)
  • This animal is Moschops capensis, an ancestor of m... ...has a particularly thick skull, according to the fossil evidence, which made it look really weird. (neatorama.com)
  • What w... ...rotron scanner was used to analyze Moschops skull fossils to see how really thick they were, and where the. (neatorama.com)
  • Museum Victoria Research Associate and Monash University PhD student Erich Fitzgerald inspects the skull of a 25-million-year-old fossil from southeast Australia identifying a new family of small, highly predatory, toothed baleen whales with enormous eyes. (howstuffworks.com)
  • For example, the skull shown above is a 25-million-year-old fossil from a baleen whale . (howstuffworks.com)
  • Dorset is the county with the most fossil finds, and it celebrates by hosting much of the World Heritage-protected Jurassic Coast, as well as Lyme Regis Museum, home to an impressive fossil collection, and the Dinosaurland Fossil Museum. (telegraph.co.uk)
  • The one-square-mile plot of land is called The Jurassic Mile due to the abundance of dinosaur fossils, which represent giant sauropods, ferocious theropods, preserved plant life, trackways and buried sea life. (prweb.com)
  • As the museum receives new material, visitors will be able to view and touch some of the fossils being prepped in the newly expanded Jurassic Paleo Prep Lab, called the Polly Horton Hix Paleo Prep Lab, within the Dinosphere® exhibit at The Children's Museum of Indianapolis. (prweb.com)