Scientists think they might finally know where the Moon came from

Humanity has existed for a couple hundred thousand years, or so scientists believe, with civilization thought to be somewhere in the neighborhood of 5,000 to 6,000 years old. For the entire time, we've looked up at the Moon and wondered where exactly it came from and why it's been hanging around for so darn long. Theories have come and gone, but there hasn't been any definitive proof to ultimately quiet the debate. That proof might come when China and other nations head back to the moon to perfo...