Was there a Stone Age apocalypse or not? New Scientist - November 19, 2009
One narrative has it that about 13,000 years ago a comet blasted North America, wiping out the continent's megafauna Ð as well as its early settlers. It's a compelling story, offering a simple explanation to the mystery of why mammoths, mastodons, and Clovis humans vanished. But it's a controversial theory, and new research suggests the impact was far too small to have done any serious damage.
10 Failed Doomsday Prophecies National Geographic - November 6, 2009
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