Grab-and-go missions to asteroids have provided some of the most scientifically valuable samples since the Apollo ...

Properly deciphering the branching pathways of evolution could unlock the history of every component of natural biology.

Early Mars seems to have had a protective atmosphere and liquid water in the form of oceans, rivers, and lakes. It may also ...

Scientists trace an ancient microbe, Asgard archaea, that gave rise to humans, animals, and plants more than 2 billion years ...

Life on Earth began in a world of volcanic eruptions, violent storms, and a toxic atmosphere. Yet somehow, from this chaos, ...

The clearest picture yet of our “last universal common ancestor” suggests it was a relatively complex organism living 4.2 billion years ago, a time long considered too harsh for life to flourish. If ...

Scientists have discovered that complex life began evolving much earlier than traditional models suggested. Using an expanded molecular clock approach, the team showed that crucial cellular features ...