Superfluidity is a part of physics, referring to the phenomenon where certain liquids flow without friction.

He was struggling to understand the concept of a hypercube.

America is one of the superpowers in the world.

In physics, ultrashort waves form a part of the electromagnetic spectrum.

Radio astronomy plays a very important role in understanding the universe.

Infrared astronomy provides a new perspective on understanding the universe.

He is an excellent doctor.

He is a famous author, and his works are loved by many readers.

Mercury is a harmful element for the body.

Her hair was shining in silver.