He is an expert in astrophysics.

This factory reuses the byproducts produced during the manufacturing process.

A tardigrade can survive in extreme environments.

Ruminants have the characteristic of re-chewing food after swallowing it once.

He is an expert in applied physics.

Invasive species can have a major impact on the natural environment.

This inorganic compound plays an important role in chemical reactions.

In marine biology, plankton is an important part of the marine ecosystem.

I am majoring in Biochemistry at university.

He is very interested in paleontology.