XR flew about 1.37 million miles (2.2M km) away from Earth. The space rock is estimated to be about 300-700 km (248-434 miles ...

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

This impact unleashed about 130 times the energy of the current global inventory of nuclear weapons. Read more at ...

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons on the lunar far side.

That is good news for scientists and Nasa, which is looking to land astronauts at the south pole on the near, Earth-facing ...