The giant-impact hypothesis posits that billions of years ago a Mars-sized body named Theia collided with the early Earth.

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

Fluctuations in ancient Earth’s environment might have propelled the chemical complexity that laid the foundation for life.

Some cyanobacteria have pigments that specialise in harvesting green light to power their photosynthesis, which may be an evolutionary adaptation to a time when the oceans were iron-rich and green-tin ...

Deep-seated mantle structures known as LLSVPs have been found to be over a billion years old, affecting tectonic activity.

From the beginning of time to the origins of life, our "when" special series tackles the timing of crucial events and the ...

Tropical riparian ecosystems—those found along rivers and wetlands—recovered much faster than expected following the ...

Commissions do not affect our editors' opinions or evaluations. A one-year certificate of deposit (CD) gives you a guaranteed return on your investment with the security of FDIC insurance and the ...

Scientists accidentally discovered that the Earth's inner core might not be how we thought it was - and it could affect the length of a day.

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