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Sabre-toothed cats, short-faced bears, camels, wild horses, mammoths and many other large creatures disappeared from Siberia, Alaska and Canada at about the same time thousands of years ago. Researchers recently sampled DNA from about 350 fossilized bison bones in an attempt to help clear up the confusion on these extinctions.The scientists say that this new bison information lets us see what was probably happening to big animals besides bison that lived in the same areas at the same time.
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