Biological Miracle – Wood Frog

> No heartbeat. No breathing. For the entire winter, the wood frog is like a lump of hard, frigid, icy stone carved in the shape of a frog. But it’s alive, in a state of suspended animation.

I find it hard to grasp what is still alive about the frog. I mean, it's not dead so there must be something happening inside the frozen frog? How does it compare to a dead (and frozen) wood frog?

A live frozen frog has ice around it's cells. Inside the cells remains liquid because of extra glucose acting as anti-freeze.

A dead frozen frog will be frozen completely, with all the cells having ruptured walls from their insides freezing.