They were dug out by debris sent violently aloft when an asteroid or comet struck the lunar surface 3.8 billion years ago.

The Grand Canyon in Arizona is one of Earth's natural wonders, carved out over millions of years by the gradual erosion power ...

The Grand Canyon in Arizona is one of Earth's natural wonders, carved out over millions of years by the gradual erosion power ...

This discovery is promising for scientists and NASA, which plans to land astronauts at the south pole on the near side of the ...

A colossal explosion in the sky, unleashing energy hundreds of times greater than the Hiroshima bomb. A blinding flash nearly ...

Scientists are closely monitoring a massive asteroid that could strike Earth in 2032, with the potential for catastrophic ...

A colossal explosion in the sky, unleashing energy hundreds of times greater than the Hiroshima bomb. A blinding flash nearly ...

It may sound apocalyptic, but a newly detected asteroid nearly the size of a football field now has a greater than one ...

It may sound apocalyptic, but a newly detected asteroid nearly the size of a football field now has a greater than 1% chance ...