It's thought to have emerged over 80 million years ago, but it wasn't until 2003 that ... as the power of plate tectonics transformed the Earth into the sprawling puzzle of continents we see ...

Near-Earth asteroid Bennu has a slim chance of colliding with Earth in 2182. If it does, the impact could trigger a global ...

A few fossilized body parts hinted at an enigmatic bird's close ties to waterfowl like ducks and geese. A newfound skull may bolster that idea.

Researchers have proposed that Earth may have had a ring system 466 million years ago, during a period of intense meteorite bombardment known as the Ordovician impact spike. This finding ...

About 800 million years ago, oxygen levels reached about 21 percent and began to breathe life into more complex organisms. The oxygen-rich ozone layer was also established, shielding the Earth's ...

Over two hundred fifty million years ago, India, Africa ... which can't sink into the Earth's dense mantle. For at least 80 million years the oceanic Indian Plate continued its inexorable ...