He has a deep interest in paleozoology.

The ecosystem of zoobenthos is an important field of study in marine biology.

Anthropozoonosis, or animal-derived infectious diseases, have the potential to spread between humans and animals.

Einstein proposed the theory of relativity.

His actions always have a duality.

My younger brother caught the influenza.

This material has high corrosion resistance.

The prevention of venereal diseases is most important in safe sexual behavior.

This equation has homogeneity.

Radioactive elements are produced in nature and scientific experiments.