Vampires get all the attention at this time of year, but bloodthirsty leeches, insects and birds are just as compelling — and they’re real. Leeches feeding on a homemade “blood sausage,” made from cow ...

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

Learn about a 480-million-year-old leech fossil that revealed that ancient leeches didn’t have the biological components necessary to suck blood. It’s the beginning of the spooky season, which means ...

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 ...

Receive emails about upcoming NOVA programs and related content, as well as featured reporting about current events through a science lens. Mark Siddall: Dear Inge, Yes. Stay very very still. They are ...

A broad survey conducted across southern Asia reinforces the idea that the mammal biodiversity of an area can be determined by looking at the DNA found in leeches' blood meals. The new study also ...

She’s a different kind of blood donor. Think your pet leeches off of you? An Oregon woman sent shudders across social media after revealing that she keeps leeches as pets — and even lets them suck her ...

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