After the formation of the moon, meteorites deposited elements like gold on Earth and the moon, but not in the same amounts. New research explains why.

Astrophysicists have identified an event 4.6 billion years ago as the likely source of some of the most coveted matter on Earth.

We may have a proto-sun to thank for the Earth's solid surface and mild climate, researchers report.

Our planet is 4.5 billion years old, but its inner core may be a lot younger.

The same impact that created the moon most likely delivered the elements necessary for life on Earth, researchers say.