Good news: A new species was discovered on the Atlantic Coast. Bad news: It’s a bloodsucking leech that feeds on humans with three jaws and as many as 59 teeth. In a recently published journal, ...

WALKER, Minn. — Minnesota's third-largest lake has a namesake only an angler could love: the leech. Earthworm's ugly aquatic cousin. Those slimy, crawly creatures straight out of a horror film. But ...

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European medicinal leeches were famous for their popular purpose: treatment for everything from cancer to mental illness. But the high demand left them endangered—still today. Bloodletting ...