He is known as an expert in criminology.

Astrobiology is a very interesting field of study.

He is an expert in paleontology.

He is an expert in paleoanthropology, conducting research on the origins of mankind.

He is interested in ichthyological research.

He is an expert in aerobiology, engaged in the study of microorganisms in the atmosphere.

He is an expert in astrophysics.

He is a specialist in cardiology.

He is an expert in comparative linguistics.

Computational linguistics is the study of analyzing human language with computers.