FossilsPaleontologyBiological EvolutionPhylogenyFossil FuelsAmberHominidaeDinosaursPaleodontologyExtinction, BiologicalGeologyGeological PhenomenaHistory, AncientDentitionSkullToothReptilesConiferophytaAnthropologyInvertebratesSkeletonGenetic SpeciationGeographyCetaceaAnatomy, ComparativeEvolution, MolecularAngiospermsEcosystemBiodiversityMammalsEvolution, PlanetaryBirdsEgg ShellNeanderthalsGeologic SedimentsArtiodactylaAnimal ShellsRadiometric DatingTimeArthropodsArchaeologyWyomingAlligators and CrocodilesGeological ProcessesClassificationBody SizeGymnospermsVertebratesMenispermaceaeSireniaEchinodermataPhylogeographyForaminiferaClimatePreservation, BiologicalFeathersAtmosphereBiofuelsGreenhouse EffectMarine BiologySouth AmericaEnergy-Generating Resources