Leeches might seem like relics of a bygone age of medicine, but they haven’t outlived their usefulness to people yet. The freshwater leech Helobdella austinensis can eat its weight in snails every day ...

Dr. Solomon David, a fish ecologist at the Shedd Aquarium in Chicago, is a huge movie buff, looking forward to "Avengers: Age of Ultron," "Star Wars" and all of the other big blockbusters coming out ...

Shedd Aquarium postdoctoral research associate Solomon David captured video of what appears to be a massive school of leeches he unintentionally discovered while in the field in Green Bay, Wis. The ...