The stone named Hypatia from the Egyptian desert could be the first tangible evidence found on Earth of a supernova type Ia explosion.

Water is essential for life on Earth and other planets, and scientists have found ample evidence of water in Mars’ early history.

As a planet grows, it accumulates material from its surroundings, so its composition reflects the environment in which it formed.

Earth is believed to have formed partly from carbonaceous meteorites, which are thought to come from outer main-belt asteroids.

Earth's core is characterized by extremely high pressure and temperature. It is composed of a liquid outer core and solid inner core.

There are five significant mass extinctions, known as the "big five," where at least three-quarters of all species died.