A new explanation for the solar system's radioactive elements suggests Earth-like planets might be found orbiting up to 50 ...

Sophisticated new chemical analysis of gases trapped in rocks for millions of years has cast new light on the origin of the ...

Some 4.6 billion years ago, Earth was nothing like the gentle blue planet we know today. Frequent and violent celestial impacts churned its surface and interior into a seething ocean of magma—an ...