to 18 inches long. How would you like to have that squeezing between your bare toes? Squeezing through tight spaces is, in fact, a leech specialty. One expert describes how he closed his fist ...

The new leech species has three jaws, five pairs of eyes aligned in a U-shape, a disc-shaped “caudal sucker” for attachment, and a long conical body that changes size and shape depending on how much ...

Legends of “flying leeches” have fueled a centuries-long debate among biologists on whether the worms can leap. But a 2017 cell phone video (shown below) by a researcher may provide answers.