He is an expert in physical anthropology.

He is an expert in physical anthropology, conducting research on human evolution.

Gestalt psychology is an important means to understand human cognitive processes.

Molecular biology is a field of study that understands life phenomena at the molecular level.

He is an expert in topology.

I am very interested in sociolinguistics.

He is an expert in biophysics.

He is an expert in algebraic geometry.

He is an expert in ethology, and his research is highly regarded worldwide.

I am majoring in developmental biology at university.