Zircons also contain uranium; by measuring the stages of uranium’s decay in zircons, geologists use the minerals as chronometers for studying Earth’s past. The researchers examined sediments ...

Caption The researchers posit four stages of Earth’s past and possible future to illustrate how planetary intelligence might play a role in humanity’s long-term future. Right now, Earth is an ...

It is widely believed that Earth's atmosphere has been rich in oxygen for about 2.5 billion years due to a relatively rapid increase in microorganisms capable of performing photosynthesis.

The shape is thought to be the result of leftover fuel released into space as the Falcon 9 rocket returned to Earth.

In orbit around the white planet is a single cratered moon. You are gazing on Earth in the Cryogenian period, 700 million years ago. This is about three times as long ago as the earliest dinosaurs ...