One of the slowest moving creatures in our world, the snails become the hosts of a ghostly parasite that turns them into zombies. This isn't an episode out of some horror movie but a truth that ...

There is the Banggai cardinal fish, found only in Indonesia ... until it eventually becomes a zombie shrimp that just feeds and fuels the growth of the parasite,” he explains.

Normally if a mouse sees a cat, it scuttles away in the other direction, but that's not what happens after mice get infected with a parasite called Toxoplasma gondii. Once inside the mouse's body ...