The Science Channel's 'Through the Wormhole' series hosted by Morgan Freeman says we may already be in the midst of a growing zombie apocalypse. "What is a zombie? A zombie sis a creature that's controlled outside of its own mind and really not controlled by itself, as if under the power of some other force."
In the latest episode, they explore how well humans would do if an outbreak were to occur.
Here's a zombie-like fungus that takes over the mind of an ant...kills it...and turns it into the 'crawling dead.' CREEEEEPY!