View full lesson: http://ed.ted.com/lessons/howparasit...

The biggest challenge in a parasite’s life is to move from one host to another. Intriguingly, many parasites have evolved the ability to manipulate the behavior of their hosts to improve their own survival sometimes even by direct brain control. Jaap de Roode details a few parasites that can really mess with the mind.

Lesson by Jaap de Roode, animation by Andrew Foerster.