Two gargantuan canyons on the moon were carved by a hailstorm of rocks — and that’s good news for future lunar astronauts.
Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...
The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.
The extraordinary formations, each comparable in size to Earth’s Grand Canyon, are hidden on the far side of the moon — the side that always faces away from Earth — near the lunar south pole ...