When there’s no more room in hell, the dead will walk the earth. Or at the very least they’ll stagger around in shopping malls. The living dead have featured in sci fi and horror since their voodoo inspired origins and there isn’t a comic book superhero who hasn’t had to face them.
Zombies are such a popular monster for story writers because they tap into so many primal fears. They are hard to kill, they cannot be reasoned with and they turn you into one of them. They also smell quiet bad too by all accounts.
There seems to be some debate as to how one creates a zombie, whether it’s dark science or witchcraft. There is also some disagreement around whether or not they can run or merely shuffle. For sure though; they bite and they go pop when you shoot them in the brain (but then, who doesn’t?)