How does the wood frog survive being frozen solid?

Added: 2026-05-17

[00:00:00]Ever heard of a creature that [music] dies every winter just to be born again?

[00:00:05]Meet the wood frog.

[00:00:07]When temperatures plummet and the forest [music] turns into a silent, icy tomb, this tiny miracle does something biologically impossible.

[00:00:16]It doesn't [music] fight the freeze. It surrenders to it.

[00:00:20]Its heart stops.

[00:00:23]Its breathing vanishes.

[00:00:25]Its blood stands still.

[00:00:28]65% [music] of its body becomes solid ice.

[00:00:32]Technically, it is dead.

[00:00:34]But inside, [music] a secret weapon is at work.

[00:00:38]The frog's liver floods its system with massive amounts of glucose, a natural antifreeze. [music] This sugar prevents ice crystals from forming inside the cells, which would be fatal.

[00:00:50]Instead, [music] the ice only forms in the gaps between them.

[00:00:55]For weeks or even months, it remains [music] a frozen statue.

[00:01:00]Then, as spring whispers and the ice begins to thaw, the miracle unfolds.

[00:01:05]>> [music] >> The heart gives its first faint thump.

[00:01:09]The blood begins to circulate.

[00:01:11]Within hours, [music] the frog hops back into the wild as if nothing ever happened.

[00:01:17]This isn't just survival. [music] It's precise biological engineering.

[00:01:22]In a world where freezing usually means the end, for the wood frog, it's just a temporary [music] pause before life starts all over again.