What happens to an earthworm throughout its life? Life begins when two worms mate, top to tail. A hard covering forms around the worm and it wriggles out to leave a cocoon. An earthworm uses both ...

How do you get rid of river blindness? It's all about the worm. Specifically, about "breaking the life cycle" of onchocerca volvulu, the parasitic worm that causes the disease, says Dr. Frank O.