The Teutonic Knights were a military monastic order active in medieval Europe.

The biker gang is causing a commotion in the town.

The Knights Templar was an important military organization in medieval Europe.

He is protecting the town as a vigilante.

This compound has a tetrahedral molecular geometry.

Cosmic background radiation is considered evidence of the Big Bang.

My dream is to become an astronaut.

Astrobiology is a very interesting field of study.

He is majoring in aerospace engineering.

The space probe discovered a new planet.