The World Science Podcast: In Praise of Leeches

Leeches aren't the most glamorous of study subjects. But zoologist Mark Siddall of the American Museum of Natural History is passionate about them. He has traveled to remote corners of the world collecting leeches and documenting their diversity. Understanding the blood-sucking behavior of leeches can ultimately help the field of medicine, says Siddall. Learn more in the latest World Science Podcast.