In organic chemistry, understanding geometric isomers is important.

I love mathematics.

He is researching about a new energy source.

He is conducting research on a new energy source.

He is interested in phrenology.

He is interested in ancient mathematics.

I am majoring in parasitology at university.

Cartography is an important field of study for visually representing geographic information.

He is majoring in metallurgy at university.

He is an expert in oceanography.