This square shape is perfect.

His driving is perfect, but sometimes he overlooks blind spots.

The assassin disappeared into the darkness of the night.

From his visual angle, the problem looks completely different.

Protists are being studied in a branch of biology.

He is majoring in zoology at university.

I love biology.

He is an expert in mineralogy.

He is an expert in paleontology and is researching dinosaurs.

He is an expert in nuclear physics.