Green oceans on early Earth, shaped by iron, pushed microbes to evolve light-absorbing tools that worked in green light.

Launched in 1958 and silent since the Johnson era, Vanguard 1 is the oldest human-made satellite still orbiting Earth — and a ...

In the intense early days of the space race, a small, unusual satellite was launched into space sixty-seven years ago.

The changes in ocean chemistry were gradual. The Archaean period lasted 1.5 billion years. This is more than half of Earth’s ...

Geologists have made certain assumptions about how the crust making up our planet's earliest surface formed, but a new study ...