He is an expert in paleontology.

Astrobiology is a very interesting field of study.

How does this machine function?

Let's try the new function of this machine.

He has the ability to change into a wolf.

He is as strong as an ox.

He received the letter challenging him to a duel and began preparing for the duel.

My biological clock is completely messed up.

Astrocytes are one of the important support cells in the brain.

Oligodendrocytes play a role in supporting the nerve cells of the central nervous system.