Animal experiments are necessary for the advancement of science, but there are also ethical issues.

He is learning about the handling of experimental animals.

We went sightseeing in Kyoto.

He is majoring in zoology at university.

This building has existed for centuries.

He believes in the philosophy of materialism.

A lion is a type of carnivore.

This area is known for producing a variety of minerals.

He and his brother look so alike, they seem like the very same person.

He is an expert in malacology, focusing particularly on the study of snails.