This Thursday, Aug 3, 2017, photo provided by the Maine Department of Inland Fisheries & Wildlife Division taken in Bangor, Maine, shows the tooth that is extracted from bears that are harvested by hunters in Maine. The growth of the bear population in the United States has provided scientists with a windfall of teeth, which are helpful for studying the health of bears. (Jennifer Vashon/Maine Department of Inland Fisheries & Wildlife Division via AP)
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