CHAMPAIGN, Ill. -- Two of the three largest impact craters on Earth have nearly the same size and structure, researchers say, but one was caused by a comet while the other was caused by an asteroid.

A giant meteor impact on Earth nearly two billion years ago triggered more explosive and long-lived volcanic eruptions than previously thought, a new study finds. This finding sheds light on how ...

Thirty-two students from Western and around the world will be journeying almost two billion years back in time in a unique, intensive one-week field course to study the planet’s second-largest impact ...

The origins of a massive 1.8 billion-year-old crater in Canada has been revealed The Sudbury Basin, which is the world's second-largest impact crater, was likely formed by an enormous comet that ...

A giant meteor impact on Earth nearly 2 billion years ago triggered more explosive and long-lived volcanic eruptions than previously thought, a new study finds. This finding sheds light on how meteor ...

Scientists have found evidence for a massive impact crater hidden underwater near the Falkland Islands. If confirmed, it could be the second biggest crater on Earth – and perhaps linked to our ...

DUBLIN, IRELAND, Wednesday May 4th, 2016 - Geochemists from Trinity College Dublin's School of Natural Sciences may have found a solution to a long-debated problem as to where - and how - life first ...