He is known as a defender of the natural environment.

This desert, like the Ganges sand, conceals a deep philosophy in its origin and meaning.

He is a citizen of three countries, holding citizenship in America, Canada, and Japan.

Demography is a part of social science that studies the structure, evolution, and problems of human population.

He is an expert in anthropology.

I am majoring in anthropology at university.

He is an expert in human anatomy.

Demography is a branch of social science that studies the structure, distribution, and changes in human population.

He is good at piloting a triplane.

He wrote a caption for the picture.