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's good news for scientists and NASA, which is looking to land astronauts at the south pole on the near,

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.

"When the impacting asteroid or comet hit the lunar surface, it excavated a tremendous volume of rock that was launched into space above the lunar surface before it came crashing