He is an expert in geophysics.

He is an expert in human anatomy.

He is known as an expert in criminology.

Astrobiology is a very interesting field of study.

Abstract algebra is a branch of mathematics that studies algebraic structures.

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.