By resurrecting a 3.2-billion-year-old enzyme and studying it inside living microbes, researchers at the University of ...

Our planet is unique for its ability to sustain abundant life. From studies of the rock record, scientists believe life had already emerged on Earth at least 3.5 billion years ago and probably much ...

Nitrogen, upon which all life on Earth depends, may hold the key for explaining how early life on the planet evolved and how it could evolve on other planets.

Earth is often described as a water world, but how that water arrived has never been settled. For years, the focus has rested ...

New research shows ancient tropical oceans once held more oxygen than cooler regions, reshaping where early life could ...