WASHINGTON (Reuters) - Research showing that our species interbred with Neanderthals some 100,000 years ago is providing intriguing evidence that Homo sapiens ventured out of Africa much earlier than previously thought, although the foray appears to have fizzled.br clear='all'/img width='1' height='1' src='http://reuters.us.feedsportal.com/c/35217/f/654220/s/4da8e9a9/sc/32/mf.gif' border='0'/div class="feedflare"
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