Originally Posted by BlackRanger

Even if there was a zombie outbreak, it wouldn't last long.

Let's face it, zombies are walking meat-bags, the difference between living humans and undead zombies is that humans still have intelligence. I mean, have you ever watched a zombie movie recently? No zombie jumps out of the way of a gun, they just stay in the line of fire.

In this sense of Zombie, they don't need to, because they can just keep going at you and firing a gun will call upon more zombies. And a lot of humans... Well, just lack the intelligence and others will be to far down the road of apocalypse and would be killing human, zombie, and animals.

So now let's imagine that an outbreak of slow, stupid and rotting zombies has just started. Now imagine that they've started in a particularly warm area. The zombies wouldn't last a day in a hot climate, they'd just keep rotting and fall apart.

They wouldn't be that putrified that quick at all. Sure after awhile some of them would be falling apart, but the majority would be fresh dead meat from survivors, and the fact that they are moving would slow putrefaction, not by much though. Also some of the dead would be bloated because of the heat, but not useless.

Same goes for cold climate. Have you heard of something called "freezer burn"? Because both humans and zombies' innards are floating in water, there would be some serious ice crystals sticking out of these zombies. They'd just freeze over, ready to be attacked.

Of course going north or high altitudes is a good idea, but have you ever thought of the toll it would take on you? You would be alive, but barely, to kill a zombie by freezing it would take sometime unless you poured some water on it and it would have to be below 0 constantly which would also screw you over, because we are only humans not bears with huge fur coats.

Let me ask another question: Have you ever left some food outside, maybe for an hour, a few hours, or even a day perhaps? Did an animal get to that food? Maybe ants, raccoons, squirrels, chipmunks, skunks, deer, just to name a few. If you have a hunk of rotting meat just waltzing around, some animal's going to get a piece of it LONG before any human even saw it. Their numbers would be whittled down rapidly thanks to our predatory friends.

No predator would want to eat disgusting rotting human over their natural prey. They would have to be driven to near starvation before they start eating zombies themselves, but even if the predators ate zombies and we ate the predators...

tl;dr: No, it will never happen.