Body TemperatureBody Temperature RegulationTemperatureCold TemperatureHot TemperatureSkin TemperatureHypothermiaThermometersFeverHibernationTelemetryShiveringThermographyCircadian RhythmSciuridaeTime FactorsHumidityThermogenesisSweatingThermometryHeat Stress DisordersSeasonsHeatingHypothermia, InducedAntipyreticsOphthalmic SolutionsImmersionPyrogensMotor ActivityPreoptic AreaThermosensingRectumEnergy MetabolismIncubators, InfantHeat StrokeHydrogen-Ion ConcentrationHeart RateHypothalamusWaterBasal MetabolismBehavior, AnimalOxygen ConsumptionSleepThermoreceptorsThermodynamicsInfrared RaysAdaptation, PhysiologicalN-Methyl-3,4-methylenedioxyamphetamineEatingRespirationTransition TemperatureInjections, IntraventricularHyperthermia, InducedThermal ConductivityCold ClimateKineticsClothingBeluga WhaleWakefulnessEar CanalClimateRewarmingLizardsCerebral VentriclesEnvironment, ControlledAdipose Tissue, BrownStress, PhysiologicalMytilusDimensional Measurement AccuracyCarbon DioxideAirAlligators and CrocodilesComb and WattlesAnalysis of VarianceCalorimetry, Differential ScanningCold-Shock ResponseBody Temperature ChangesWater Loss, InsensibleBody WeightLightAcclimatizationEnvironmentRats, Sprague-DawleyPhotoperiodBathsSleep, REMFreezingAcetaminophenModels, BiologicalMelatoninTympanic MembraneMutationMolecular Sequence DataBrainDose-Response Relationship, DrugFeeding BehaviorEarRabbitsSpecies SpecificityWhale, Killer