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T-Virus infection regenerates and mutates their cells.
I think if you approach zombies from any logical angle, you're going to find they're pretty flawed and would never 'work' as depicted in most movies.
Its easier to think of them as some magic or demonic force that's reanimating the dead not bound by traditional biological rules.
True but some movies and games angle it really well. The last of us is my favorite: https://news.sky.com/story/the-last-of-us-the-science-behind-the-real-zombie-fungus-and-is-it-an-actual-threat-12790306
there are many different types of zombies, and since they arent real theres no 'single source of truth'
in the 28 Days Later series they are not undead, they are hyper rabies infected people.
In some series it a magical or spiritual afflicition (hell ran out of room so the dead roam the earth)
In some series its a biological pathogen, so some kind of virus or fungus that takes over the body and is centrally controlling the brain.
In "Cast A Deadly Spell" they're animated by voodoo and are servants. "You can get'em in 6-packs, like bonbons!"
It's a fungus in The Girl with all the Gifts.
Your classic zombie is undead. The virus, as it's often defined in the more sci-fi horror genre, takes over after death and reboots the lower brain and spinal cord and much of the CNS up to the lizard brain(higher brain functions not so much.) The virus somehow maintains some basic active transport without a heart as a pump. Which is often why they're slow, and typically cold blooded. Sometimes the reanimation doesn't even need a brain. Severed limbs can sometimes remain animated for a while. And usually in this type you get eventual starvation where they will die without fresh flesh/brains/blood. And they tend to rot actively, falling apart over time.
Zombies tend to be short (un)lived.
Ah, I'm glad you asked - I'm an expert* on this topic. While the mental faculties of zombies are long gone, the brain still plays a part in moving limbs. The neural pulses from the brain control the muscles, even if the consciousness died a long time ago. The brain sends instructuons to the limbs, even if what is causing the brain to send them is something entirely foreign (like the Knox Virus).
To put it simply, the cerebellum (a.k.a. the "Little Brain" is what is used to move the muscles. A human brain with only the cerebellum intact could in theory still move, provided something instructs the cerebellum.
As for sharp teeth: Any dullness can be compensated for through brute force.
*: 1100 hours in Project Zomboid
Killing them is the wrong word. As you said, they already dead.
But setting aside where the energy comes from, the movement signals would still come from the brain. So destroy the brain, and the body stops.
What's really strange is when a hand gets severed but still moves. If that happens then we're genuinely looking at some kind of magic, and all logical rules are up for grabs.
Also the head is where all the sensory organs are, plus the teeth. Even if the headshot didn't kill it, a headless zombie is much less of a threat.
Shooting them in the head doesn't kill them. Nothing can. Even chopping them into little pieces, the peaces start attacking you. You can burn them up, but that will just spread the curse to other corpses in the acid rain.
My source is the zombie documentary: Return of the Living Dead (1985)
Is that the, er, documentary where a guy crawls out of the grave, waves his arms around blindly, finds his glasses in his pocket, puts them on and says "aaah!"
Probably not, actually.
Answer to all those questions is that they're magical fictional creatures.
Answer to all those questions is that they’re magical fictional creatures.
I mean there is that, but at least to some extent fiction has rules, though it's worth pointing out most broadly, that's the issue with popular frequently re-imagined things, as every lore has it's own complete seperate set of rules. Rules are added, removed, changed etc... for every re-interpretation. Zombies could be cursed, magical or maybe semi-realistic scientific explanation. Same problem if you try and explain vampires, as obviously the classic lore they need to be invited in, can be defended from by throwing rice on the ground, cannot cross running water, weak to sun, can't have reflections, only killable with a wooden stake, or supernaturals vampires that can only be decapitated and lack most of those weaknesses, or twilight where the sun makes them glittery.
Oh, no doubt - there's plenty of rules for zombies too. It's just that you can't apply real-world logic to a zombie apocalypse because the only way for one to be feasible is if we first accept a few impossible claims and don't question them.
Zombies are dead by definition, so no heartbeat. They don't get thirsty or hungry - they eat flesh but not to survive, it's just instinct. They don't freeze or overheat, they rot really slowly, they can't communicate, run, climb, or swim. They can't bleed out, suffocate, or be poisoned. The only way to kill one is by destroying the brain. Why? Well, because that's the rules we all agreed on the moment we start seriously discussing zombies.
agreed there, though where I'd say further it's about rules internal consistency as well. IE obviously just about every fictional monster has a complete disregard of science, though some more than others can stick to the rules set out in the fictional world.
hey, we've only had RFK in charge for a year, be patient.
The dude has a worm in his brain and scavenges roadkill on the regular. Are we sure he’s not a zombie?
Not quite. Zombies are the result of a bocor's curse or ritual (voodoo black magic). They are real, to a point. They were drugged and had some psychosomatic responses to the curse. I think they're originally from Haiti, I think, but trace their roots back to the Yourba religions.
They later got picked up by fiction and then turned into mainly biological causes instead of curses.
The belief that the brain is the center of the consciousness/soul
this post was submitted on 08 May 2026
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