Wood frogs often freeze solid over the winter, only to thaw out in spring time and resume their regular lives. Basically, the wood frog generates its own natural anti-freeze that protets its cells when they are frozen, and scientists are trying to reproduce the effect for use in organ transplants. The Washington Post has a time-lapse video of a thawing frog here. It’s cool, but if any Corner readers have wood frogs of their own, I would not recommend trying this at home.