Animal revived after being frozen for 24,000 years in Siberian permafrost - CNET

This rotifer, a microscopic animal, is also known as a "wheel animalcule.".

Rotifers are also known as "wheel animalcules," thanks to the Latin root of their name which relates to a rotating "wheel" of tiny hairs at one end of their body.

Tardigrades -- endearingly known as water bears -- are microscopic animals that can survive freezing, radiation and even being fired out of a gun (up to a point).

The team intends to keep looking for more animals that may be able to survive in similar circumstances

If scientists can understand how the animals protect and preserve themselves, they may be able to improve cryonics for more complex animals, like humans