He is majoring in applied mathematics at university.

Taxonomy is the science of finding, understanding, and naming species of organisms.

I love biology.

Phonetics is a part of linguistics that studies the physical, physiological, and psychological aspects of sounds.

He is a world-renowned scholar.

He is majoring in mineralogy at university.

Cytology is a branch of biology that studies the structure and function of cells.

He is majoring in zoology at university.

Geomorphology is the science that studies the surface shape of the earth.

Geopolitics is the key to understanding important aspects of international relations.