Preventing frog-sicles

Trio of chemicals keeps some frogs from freezing to death

By Stephen Ornes, 13:59 PM August 28, 2013


Wood frogs in some regions appear to rely on antifreeze to survive extreme winters. Credit: iStockphoto



Even in the super cold, Alaskan wood frogs can survive. Sure, up to two-thirds of the water in their body may freeze. But with a slow thaw, they’ll spring back to life. Scientists now report how it’s done: The hoppers produce a natural antifreeze.


Wood frogs live across a broad swath of North America. Their range spans from Georgia up through Canada and into Alaska’s Arctic forests. But members of this species (Rana sylvatica) don’t all encounter equally extreme winters. The average Januar...

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