Deer, foxes, rabbits, etc. are all warm blooded mammals that regularly experience sub-freezing temperatures that would kill humans in a matter of hours. How do they survive?
In: 1817
I wish I could answer with one word!
Endothermy.
We mammals run hot. With insulation and burning calories we’re always warm and a high metabolic rate.
Other adaptations help too but it’s mostly the first thing. Exothermic animals rely on antifreeze or high ammonia blood.
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