Frogs That Can Freeze Solid, Then Thaw Out Later With No Damage Because Of Sugar

Wood frogs can tolerate the freezing of their blood and other tissues. Special proteins in their blood called nucleating proteins, cause the water to freeze first. This ice, in turn, sucks most of the water out of the frog’s cells. The frog’s liver makes large amounts of glucose to keep the cells inflated, like a natural form of antifreeze.

There is no beating heart or brain activity until they thaw, full flatline.


Humans lack these nucleating proteins, so when we freeze, we get frostbite, which lethally sucks all the water out of our cells and causes them to collapse. Put simply the frogs replace the water in their cells with sugar to enter a state of suspended animation.

Categories: Nature Beyond NormalTags:


  1. Thank you for your whole hard work on this site. My daughter really likes carrying out investigations and it’s really simple to grasp why. We know all concerning the lively ways you render great guidelines via the blog and even encourage contribution from others on the article and my girl is actually studying so much. Take advantage of the remaining portion of the new year. You are always doing a terrific job.


  2. Frogs are pretty resilient. They can also burrow for months, even years of drought and wait for the next rainfall. Seems pretty boring, but hey, who am I to dispute such lengthy survival?

    Liked by 1 person

I want to hear what you have to say

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: