The Olmecs and How They Vanished from History

The Olmecs and How They Vanished from History Over the past week, when I read about the nuclear disaster in Japan, and then again and again, about the disaster, being harder and harder to control, I wondered..... What if some kind of nuclear event wiped out the civilization that we can find no trace of? What if, something nuclear happened from outer space? Bell Theorm leads to the thought that something from outer space, some lethal cosmic ray might have caused the disapperance of the people. What if?