But leeches aren’t just useful at crime scenes. These creatures’ sanguineous appetites have also come in handy for scientists, who are hoping to use them to solve another mystery: the diversity of ...

Ibn Battuta, a medieval Muslim traveler, described seeing the “flying leech” while visiting what is today Sri Lanka in the ...

The leeches aren't too discriminating ... like the spiky-leaved plant at right, or any trees for that matter. That rash on Mark's left arm? From a toxic tree resin. Oh, and keep an eye out ...