Science

In terms of size, the Earth ranks fifth among the planets in the solar system.

The brain generates up to 80,000 thoughts a day.

There are many theories about the formation of the Moon, but the most probable is that in the early days of the Solar System, the proto-Earth collided with a celestial body the size of Mars, and this impact generated enough energy to throw enough material into Earth's orbit to form the Moon.

Phobos was discovered by Asaph Hall on August 18th, 1877, through a telescope at the United States Naval Observatory, Washington, D.C.

Silver has the lowest contact resistance among all metals.

Pure high-quality silver contains at least 99.9 percent of this metal.

The Aurora Australis appears within the Earth's south magnetic pole.

Underneath the icy crust is an ocean of liquid water 75 kilometers deep.

It is believed that the aurora phenomenon may occur on all other extrasolar planets that have a magnetic field and a magnetosphere exposed to stellar winds.

Amber comes in various shapes and a wide range of shades.