Controversial historian Gavin Menzies is claiming that this map from 1418 proves that the New World was discovered by China's Admiral Zheng He some 70 years before Columbus. But that's not the half of it.
The Great Chicago Fire is the most famous inferno in American history. But it wasn't even the worst fire that night. This is the story of America's most fiery night, and the crackpot theory about a lost comet that's meant to explain what really happened.