DNA analysis shows the bears may have become their own species as far back as 600,000 year ago.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/0XttCZelsI8" height="1" width="1"/>
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DNA analysis shows the bears may have become their own species as far back as 600,000 year ago.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/0XttCZelsI8" height="1" width="1"/>