Frogs That Freeze Themselves Alive
Some frogs, like the wood frog, have a survival trick straight out of science fiction—they freeze solid during winter. Their hearts stop, their blood stops flowing, and ice crystals form in their bodies. But thanks to a natural antifreeze made of glucose and urea, their cells are protected from damage. When spring returns, they thaw out and hop away like nothing happened.
This isn’t just a neat party trick—it’s a full biological shutdown that lets them survive in places where temperatures drop well below freezing. Scientists are fascinated by this process and are studying it for potential use in organ preservation and space travel. Nature invented cryogenics long before humans ever dreamed of it.
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