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 ...

A 430-million-year-old fossil reveals that the first leeches were ocean predators, not bloodsuckers. The discovery radically ...

The oldest leech ever discovered has turned out to be a shape shifter of expectations, preserving a body plan that looks ...

More than just being the stuff of lake swimmers’ nightmares, the “leech-nado” video filmed by a Shedd Aquarium researcher gives Chicagoans one more reason to spurn Green Bay. What is a leech-nado?

On July 29, 2008, Mark Siddall answered selected viewer questions about leeches large and small, the best way to remove one from your skin, whether he'd undergo leech therapy himself, and more. Please ...