The human body is such a magnificent thing. Just check out this video that shows how our immune system works. When a parasite finds its way inside a place where it clearly shouldn't be, white blood cells immediately start rushing to the rescue. It only takes a few seconds for the parasite to get swallowed.
It's sad that this praying mantis was killed—but what comes out of its body is as disgusting as it's long. Horsehair worms ride in live invertebrates, feeding and growing up to 39 inches as they mature. Some release chemicals to make hosts seek water and drown, others can survive their host's predation, so do not mess.
Neurocysticercosis is an infection that happens when you have the misfortune of eating bad pork. It causes severe seizures. Researchers say they've finally discovered how it tweaks the brain, and they might already have a drug to fix it.
Malaria kills almost a million people every year and makes another 250 million people very, very sick. Soon we may be able to instantly cure the scourge the same way you heat up your sad, frozen dinner-for-one.
Cancer patients may feel like they have alien creatures growing inside their bodies, robbing them of health and vigor. According to one cell biologist, they're exactly right. The formation of cancers is really the evolution of a new parasitic species.