A woman's skeleton excavated from an underwater cave on the coast of Mexico's Yucatan Peninsula has been dated to 13,600 years ago, making it the oldest set of human bones ever discovered in the New World. What's more remarkable, perhaps, is that the skull does not appear to be related to the skulls of the northern Mongols believed to have crossed the Bering Straits land bridge. Where did the people originate whose bones lie underwater in the Yucatan? With photo.
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