The oldest leech ever discovered has turned out to be a shape shifter of expectations, preserving a body plan that looks ...

The bloodsucking worms might conjure an era of vampiric pseudoscience, but their powerful jaws are inspiring new applications. By Zoey Poll The average patient today, confronted with the prospect of ...

European medicinal leeches were famous for their popular purpose: treatment for everything from cancer to mental illness. But the high demand left them endangered—still today. Bloodletting ...