Some otters rely on tools to bust open hard-shelled prey items like snails, and a new study suggests this tool use is helping them to survive as their favorite, easier-to-eat foods disappear.
Researchers have compared the DNA of 27 Black people who lived at the Catoctin furnace between 1774 and 1850, finding a link between these enslaved Americans and nearly 42,000 living relatives.
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By:
Scott Maucione
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