in the middle of a frozen lake you might see a crocodile with its nose and mouth sticking out of the ice it looks like it’s frozen to death but it’s actually alive this is the crocodile’s energy saving mode as a cold blooded animal it can’t regulate its body temperature so it slows its metabolism to survive the winter by lowering its heart rate to just five beats per minute and burning fat slowly the crocodile conserves energy think of it like humans in Winter staying under a blanket with only t