Wood frogs freeze solid and come back to life
The remarkable wood frog freezes solid in winter, stopping its heart and producing natural antifreeze, only to thaw and resume normal life in spring, inspiring medical cryopreservation.
Imagine surviving winter with your heart stopped and 65% of your body frozen solid! That's exactly what the wood frog, found across North America, does. As temperatures plummet, its body produces natural antifreeze (glucose) and special proteins to protect cells from ice damage.
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