Zombies! (24 Photos)

Are you ready for the zombie apocalypse? Some studies shows the possibilities that this could really happen.
A zombie is an animated corpse resurrected back to life by mystical means, such as witchcraft (who loves to eat brains!). The term is often figuratively applied to describe a hypnotized person bereft of consciousness and self-awareness, yet ambulant and able to respond to surrounding stimuli. Since the late 19th century, zombies have acquired notable popularity, especially in North American and European folklore.
5 Scientific Reasons a Zombie Apocalypse Could Actually Happen

1. Brain Parasites
As seen in Resident Evil IV
Parasites that turn victims into mindless, zombie-like slaves are fairly common in nature. There's one called toxoplasmosa gondii that seems to devote its entire existence to being terrifying.

2. Neurotoxins
As seen in The Serpent and the Rainbow (The movie), the upcoming Resident Evil 5 video game.
There are certain kinds of poisons that slow your bodily functions to the point that you'll be considered dead, even to a doctor (okay, maybe not to a good doctor). The poison from fugu (Japanese blowfish) can do this.

3. The Real Rage Virus
As seen in 28 Days Later
In the movie, it was a virus that turned human beings into mindless killing machines. In real life, we have a series of brain disorders that do the same thing. They were never contagious, of course. Then, Mad Cow Disease came along. It attacks the cow's spinal cord and brain, turning it into a stumbling, mindless attack cow. And, when humans eat the meat ...

4. Neurogenesis
As seen in Laboratories around the world.
You know all that conversy out there about stem cell research? Well, the whole thing with stem cells is that they can basically be used to re-generate dead cells. Particularly of interest to zombologists like ourselves is neurogenesis, the method by which they can re-grow dead brain tissue.
You can see where this is going.

5. Nanobots
As seen in Michael Crichton's novel Prey, The PS2 game Nano Breaker
Nanobots are a technology that science apparently engineered to make you terrified of the future. We're talking about microscopic, self-replicating robots that can invisbily build--or destroy--anything. Vast sums of money are being poured into nanotechnology. Sure, at some level scientists know nanobots will destroy mankind. They just can't resist seeing how it happens.

Read more about this topic.
Source: Cracked