4. Wood Frog
The wood frog, Lithobates sylvaticus, exhibits a remarkable adaptation to survive harsh winter conditions. As temperatures drop, it enters a state of suspended animation, allowing ice to form in its body while its heart and breathing cease. This process is facilitated by the production of glucose, which acts as a natural antifreeze, protecting the frog’s cells from damage. When spring arrives, the frog thaws and resumes normal activity. (nationalgeographic.com)