This structure has existed for centuries.

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.

Carbohydrates are important as a source of energy.

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

Manako is my best friend.

This new app is suitable for everyone and their mother, and anyone can use it easily.

This new game is made for everyone.

I think what he says is utterly ridiculous.