Body TemperatureBody Temperature RegulationTemperatureSkinCold TemperatureHot TemperatureSkin TemperatureHypothermiaThermometersFeverHibernationTelemetryShiveringSkin AgingThermographySkin DiseasesSkin NeoplasmsCircadian RhythmSkin Physiological PhenomenaSciuridaeTime FactorsHumidityHeat Stress DisordersThermogenesisThermometrySweatingHeatingSeasonsSkin TestsHypothermia, InducedAntipyreticsOphthalmic SolutionsSkin AbsorptionImmersionPyrogensSkin PigmentationMotor ActivityPreoptic AreaRectumThermosensingIncubators, InfantEnergy MetabolismHydrogen-Ion ConcentrationHeat StrokeHeart RateWaterHypothalamusThermoreceptorsInfrared RaysBasal MetabolismBehavior, AnimalOxygen ConsumptionSleepClothingThermodynamicsAdaptation, PhysiologicalRespirationHyperthermia, InducedEatingN-Methyl-3,4-methylenedioxyamphetamineTransition TemperatureWater Loss, InsensibleInjections, IntraventricularThermal ConductivityCold ClimateKineticsSkin, ArtificialEar CanalWakefulnessBeluga WhaleClimateRewarmingLizardsStress, PhysiologicalEnvironment, ControlledCerebral VentriclesAirCarbon DioxideAdipose Tissue, BrownMytilusDimensional Measurement AccuracyAnalysis of VarianceComb and WattlesAlligators and CrocodilesBody WeightCalorimetry, Differential ScanningBathsLightRats, Sprague-DawleyModels, BiologicalCold-Shock ResponseBody Temperature ChangesAcclimatizationEnvironmentMolecular Sequence DataMutationEarPhotoperiodDose-Response Relationship, DrugSleep, REM