WASHINGTON — Scientists with the Smithsonian have discovered a new blood-sucker in the D.C. area -- a previously unknown species of leech that has three jaws with up to 59 teeth. The scientists with ...

The exceedingly rare species is only known to inhabit freshwater pools in San Francisco, making the discovery by one amateur ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A viral video of a leech slithering across a hospital floor and leaving ...

Leeches are famous for drinking blood – and being used in medicine. But can these slippery little vampires ever be deadly?

Leeches suck. Most people try to avoid them. But in the summer of 2016, park rangers in China’s Ailaoshan Nature Reserve went hunting for the little blood gluttons. For months, the rangers searched ...

Pity the poor leech. For more than a century, it has been a poster child for the once-decrepit state of medicine. Nothing illustrates the relative backwardness of pre-20 th century health care than ...