Science

After the first period of rapid expansion, the universe began to cool.

Already in the 19th century, scientists speculated that graphite was composed of layers.

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.

The frequency of crying depends on human nature.

Up to 14.000 square kilometers of the Moon's surface may remain in perpetual shadow.

Silver is a metal slightly harder than gold.

The disease causes several symptoms from the body’s functioning.

The diameter of Deimos during a solar eclipse on Mars is only 2.5 times greater than the diameter of Venus during transit.

Liver produces bile.

Probably in 365 BC, the Chinese astronomer Gan De managed to observe Ganymede with the naked eye.