This area is seriously contaminated with radioactive isotopes.

In Christianity, God is considered as the Trinity of the Father, the Son, and the Holy Spirit.

In organic chemistry, the concept of cis-trans isomers is important.

The study of filterable pathogens is an important part of virology.

In organic chemistry, the concept of conformational isomers is very important.

A tesseract is a four-dimensional geometric shape.

A 5-cell is a simple convex polytope in four dimensions.

He is suffering from post-traumatic stress disorder from the war.

Kujō Yoshitsune, the former Prime Minister and Regent of the Go-Kyogoku, played an important role in Japanese history.

The rectus capitis posterior major muscle is a part of the neck muscles, and it helps in the action of pulling the head backwards.