He is an expert in paleontology and is researching dinosaurs.

He is an expert in mineralogy.

Protists are being studied in a branch of biology.

Arthropods are a large group of animals that include insects, spiders, shrimp, and crabs.

Carbohydrates are important as a source of energy.

He is majoring in zoology at university.

The ejecta from volcanoes help to elucidate the geological history of the Earth.

We should always remember the power of Kannon in difficult times.

I found a woodlouse in the garden.

He deeply pondered and muttered to himself in a murmur.