There are parasites all over the world that can infect humans. Some of them are easy to avoid, but others are more common ...

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 ...

In a rare medical case, parasitic worms grew underneath a woman's upper eyelid.

The human body also regenerates ... What is special about Platynereis dumerilii is that, unlike other species, regeneration in marine worms does not rely on existing stem cells.