They've existed for about 600 million years. There are about 34,000 different types of worm; many are so small you wouldn't be able to see them without a microscope! Worms are hermaphrodite ...

“The human health hazard from parasitic worms can be easily controlled by ... “Symptoms from this type of infection can vary,” Schumaker says. “Some infected people may not show any ...

Flatworms and earthworms can regrow large parts of their body. Roundworms may hold the secret to counteracting ...