Zombie Ants and Killer Fungus
nibbles2004 writes "An article in the Guardian newspaper shows how parasitic fungi evolved the ability to control ants they infect, ultimately leading the ant to its death. The fungus controls the ant's movements to a suitable leaf and causes the ant to grip onto the leaf's central stem, allowing the fungus to spore, which will allow more ants to become infected."
The article actually explains that this behavior of the fungus controlling the ant has been ongoing for 48 million years. The slashdot summary does not even mention this as the key point.
http://en.wikipedia.org/wiki/Toxoplasmosis#Behavioral_changes
A parasite found inthe urinary tracts of felines that infects about half the human population
It makes rats lose their fear of cat urine, and has been linked to schizophrenia in humans
Wherever You Go, There You Are