Watch: Virtual tour of Moon's South Pole in two Earth months

It’s cold, dark, and might hold the key to life on new worlds.

David Ladd, NASA Goddard/USRA

It’s cold on the Moon’s South Pole.

There are some regions that the Sun never touches — namely the bottoms of cavernous craters.

But it’s what’s inside those frigid craters that matters: they might be storehouses for frozen water.