He is an expert in speleology and is exploring caves around the world.

He is majoring in meteorology at university.

He is passionate about his research in futurology.

He is majoring in analysis at university.

Let's eat lunch in the school cafeteria.

He is known as an expert in gerontology.

He is an expert in acoustics.

I love histology classes.

He is majoring in climatology at university.

Demography is a part of social science that studies the structure, evolution, and problems of human population.