With that degree of freeze, most animals perish, but the wood frog cleverly counters this with some extraordinary features of its own. How does the wood frog use natural antifreeze to survive?

Wood frogs (Lithobates sylvaticus) are generally around 3 inches long with brown or grey bumpy skin. Their distinguishing features are a black ‘robber’s mask’ on their face and a green ...

A small brown frog squats motionless in a den of green moss. It inhales no breath, has no heartbeat, yet it is not dead. Rock hard and icy to the touch, this speckled North American wood frog is ...