He is an expert in malacology, focusing particularly on the study of snails.

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.