For thousands of years, humankind has stared up at the night sky and seen the Man in the Moon. Scientifically, the current theory is that the formations were caused by giant asteroid strikes. Now, however, using data from NASA's twin GRAIL lunar orbiters, an MIT team proposes another hypothesis: The Man in the Moon was created by apocalyptic volcanic activity. We're talking volcanic eruptions and rifts that would be large enough to cover almost one half of the United States in lava.