Reasons why zombies could NOT exist?

I just watched all of the show The Walking Dead in the last couple of days, which was an extremely stupid choice on my part because I scare easily. Anyway I had a really bad dream about zombies, I am writing this at 5 AM because I can't get back to sleep I'm so freaked out. I need some assurance that... show more I just watched all of the show The Walking Dead in the last couple of days, which was an extremely stupid choice on my part because I scare easily. Anyway I had a really bad dream about zombies, I am writing this at 5 AM because I can't get back to sleep I'm so freaked out. I need some assurance that zombies and I mean the evil, aggressive, cannibalistic zombies from the movies/TV shows cannot exist in real life.
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