He is majoring in ethnology at university.

He is an expert in folkloristics and has a lot of knowledge about local traditions.

He is majoring in philology at university.

He is an expert in tidology, conducting research on ocean tides.

He is an expert in iconography, immersed in the study of ancient symbols and icons.

He is interested in ancient mathematics.

I am majoring in parasitology at university.

He is interested in phrenology.

He is majoring in metallurgy at university.

He is an expert in rhetoric, teaching the techniques of speech.