He is known as an expert in psychoanalysis.

Functional analysis is a branch of mathematics that studies the properties of functions in infinite-dimensional spaces.

He is an expert in paleography, and he is good at deciphering ancient handwritten documents.

I am very interested in marine biology.

Demography is an important tool for understanding various aspects of society.

He is an expert in astrophysics, and his research is highly valued around the world.

I studied linear algebra at university.

Palaeoclimatology is the science that studies the past climate of the Earth.

He is an expert in paleobotany.

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