How Much Money Is the Zombie Meme Worth?

With the season three finale of The Walking Dead on Sunday night, we know you're looking for your next zombie fill to chew on until World War Z hits theaters. Fear not, for zombies are here to stay. From TV series and movies to video games and books, those groaning, bloodied masses know how to rake in the cash, with a $5.74 billion contribution to the global economy over the past four years. Who knew the undead could be so lucrative? SEE ALSO: Pianist Plays Killer 'Walking Dead' Theme Song â€...