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 ...

Udelnaya is a sleepy town southeast of Moscow, full of muddy roads lined with brightly painted wooden houses. Behind a frozen stream there is one large brick building that looks a little out of place.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Scientists have uncovered video evidence that at least one species of ...

You might think you know leeches: Go for a swim in the wrong shallow lake, and you’ll emerge covered in sleek black bloodsuckers that have decided you’re their next meal. But inside a leech, ...

Leech that has regurgitated part of its blood meal. Credit: Naomi Pierce and Chris Baker Scientists looking to measure the biodiversity of wild animals have added a surprising tool to their ...

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 ...