Natural antifreeze prevents frogsicles

Sugar and other chemicals keep Alaskan frogs from freezing completely

By Meghan Rosen, 17:51 PM August 21, 2013

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A body full of natural antifreeze helps Alaskan wood frogs weather winter’s chill, biologists report August 21 in the Journal of Experimental Biology.

Less ice formed in the skin and muscles of Rana sylvatica frogs living in Alaska compared with those of the same species from Ohio, the researchers found. The Alaskan frogs’ ability to fend off the cold may stem from having more freeze-preventing chemicals in their blood and tissues.

Wood frogs’ range spans a broad swath of No...

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