He is an expert in paleontology.

Many immigrant plants live in this park.

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 theoretical physics.

The ejecta from the volcano plays an important role in shaping the terrain.

My pet is a dog.

The study of organic compounds is an important field in chemistry.