The animal kingdom is incredibly diverse, and it is said that there are still species that have not been discovered.

The animal kingdom is known for its diversity and complexity.

I avoid eating animal products.

He is deeply involved in the animal liberation movement.

Protozoans are single-celled organisms.

As the name suggests, chordates are a group of animals that have a notochord.

This new game is the talk of everyone and their dog.

He gave a gift as useless as gold coins to a cat.

The experiment of Schrödinger's cat demonstrates the paradox of quantum mechanics.

This room is as tiny as a cat's forehead.