Science

Silver occurs in nature in its native form (a rare mineral consisting mainly of metallic silver), along with sulfur, arsenic, antimony and chlorine.

Anorexia is a Greek term meaning denial of appetite, or loss of appetite.

Graphene was successfully isolated and characterized in 2004 by Andrei Geim and Konstantin Novoselov from the University of Manchester.

The smallest brain mammal is the Etruscan shrew. The biggest one - the sperm whale.

Its surface is highly geologically diverse.

Later, pure silver coins were produced.

The first man to leave his home planet was Yuri Gagarin.

To the naked eye, we see the Aurora Borealis and Aurora Australis lights as greenish and white. Full colors can only be seen in the photos.

The atmospheric pressure at the surface is 146.7 kPa (1.5 bars), which makes it 45% higher than on Earth.

The Moon's atmosphere consists of 25 percent helium, 25 percent neon, 23percent hydrogen, 20 percent argon and residual amounts of methane, ammonia and carbon dioxide.