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

I am majoring in developmental biology at university.

He is majoring in oenology.

Paleogeography is a study that researches the past geographical conditions of the Earth.

Paleoecology is a field of study that investigates the relationship between past organisms and their environment.

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

He is an expert in orthoepy, teaching pronunciation.

Computational geometry is an important field of computer science.

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.