Body TemperatureHypothermia, InducedHypothermiaBody Temperature RegulationTemperatureCold TemperatureHot TemperatureRewarmingSkin TemperatureFeverThermometersShiveringHibernationTelemetryHypoxia-Ischemia, BrainThermographyHeart ArrestCircadian RhythmTime FactorsSciuridaeHeatingThermogenesisSweatingCirculatory Arrest, Deep Hypothermia InducedImmersionSeasonsHeat Stress DisordersThermometryHumidityMotor ActivityBrainEnergy MetabolismHyperthermia, InducedAntipyreticsHeart RateRectumPreoptic AreaBehavior, AnimalRats, Sprague-DawleyInjections, IntraventricularOxygen ConsumptionPyrogensAsphyxia NeonatorumHypothalamusThermosensingCardiopulmonary ResuscitationN-Methyl-3,4-methylenedioxyamphetamineCerebral VentriclesDisease Models, AnimalBasal MetabolismHydrogen-Ion ConcentrationIncubators, InfantBrain IschemiaCarbon DioxideHeat StrokeRespirationSleepAdaptation, PhysiologicalAnalysis of VarianceEatingAdipose Tissue, BrownWaterDose-Response Relationship, DrugRats, WistarThermoreceptorsComaInfrared RaysBrain InjuriesCold-Shock ResponseThermodynamicsKineticsTransition TemperatureExtracorporeal CirculationSwineSpecies SpecificityThermal ConductivityCold ClimateBody WeightStress, PhysiologicalCardiopulmonary BypassWakefulnessHeart Arrest, InducedAsphyxiaElectroencephalographyClothingTympanic MembraneClimateBeluga WhaleAnesthesiaMice, Inbred C57BLLizardsAcclimatizationEar CanalEnvironment, ControlledMolecular Sequence DataTreatment OutcomeAcetaminophenMytilusDimensional Measurement AccuracyAlligators and Crocodiles