His tribe has been practicing zoolatry since ancient times.

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.

Global warming is a big issue that affects all of us.

He is an expert in geophysics.

He believes in the geocentric theory.