More examples exist in the animal world. Ophiocordyceps, a fungus, can take over an insect's body within days, forcing it to climb up high before bursting out of the victim's head and falling below to infect others. Then there's the toxoplasma gondii parasite that afflicts rats, causing them to run deliberately towards cats and be eaten. So, how can you prepare for a zombie apocalypse, should it ever come to pass? Semi-official survival tips include stocking up with food, water and medical supplies, including first-aid kits. Keep handy battery-powered radios, knives and duct tape (because duct tape fixes everything). Of course, if your home itself is invaded by zombies, be ready to escape with the right vehicle.