He is an expert in paleozoology and has a deep knowledge about the ecology of dinosaurs.

He is an expert in orthoepy, teaching pronunciation.

I am learning the basic concepts of differential geometry.

Projective geometry is a branch of mathematics that studies geometric objects such as points, lines, and planes and their relationships.

I am majoring in microbiology at university.

He is interested in geometrical shapes.

He is an expert in paleontology.

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

Astrobiology is a very interesting field of study.

He is interested in ichthyological research.