About 4.6 billion years ago, the Solar System formed from a cloud of dust and gas collapsing in on itself due to gravity. The Sun, planets, and eventually Earth formed out of the cloud. But when did ...

In a first, researchers have discovered fragments of Earth's precursor that contain distinctive chemical fingerprints in ...

The most popular theory – often called the ‘big whack’ – says that about 4.5billion years ago, an early, Mars-size planet named Theia slammed into Earth. Some tossed-out debris then squished together ...