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 ...

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 space rock the size of a large mountain hit 1.8 billion years ago and dredged up part of Earth's lower crust, essentially turning a bit of the planet inside out, a new study concludes. Subscribe to ...

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Editor's Note: This story was updated at 1:55 p.m. E.T. 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 ...

The origins of a massive 1.8 billion-year-old crater in Canada has been revealed Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive content. The Sudbury Basin, ...

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 ...