The last known animal belonging to the group was Trogolemur.

It is the largest known animal in Earth's history.

He was also determined to eat every known animal.

This is the largest eye of any known animal.

How, for instance, did known animals use such vast quantities of collagen?

With this extra lift dragons were able to grow into the largest known flying animal.

No match could be found to any known animals.

No known animals have a system of communication that is as elaborate as human language.

No known animals have both a gas bladder and lungs.

The oldest known animal to have had a body cavity is Vernanimalcula.