For some people, one moon just isn't good enough. The quest to find a second Moon has roped in Jules Verne, the man who discovered Pluto, and a pair of deluded astronomers. But here's the thing: there really is a second moon... sort of.
The two sides of the Moon look nothing like each other: the near side is flat and low, while the far side is incredibly mountainous. We may now be able to solve this topographical mystery...and it involves a second moon.