Add Yahoo as a preferred source to see more of our stories on Google. illustration of single-cell parasites floating through the bloodstream alongside blood cells illustration of single-cell parasites ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: wildpixel via Getty ...

When a parasite infects a host, it can manipulate host behavior, which may help spread the parasite to new hosts, or enable the parasite to complete its life cycle. Parasitic worms known as hairworms ...

The brain is like a medieval castle perched on a cliff, protected on all sides by high walls, making it nearly impenetrable. Its shield is the blood-brain barrier, a layer of tightly connected cells ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. In something straight out of HBO's hit zombie show The Last of Us, a ...

Our world is full of bizarre and intriguing creatures. One of the strangest, though, is the hairworm, a parasitic worm known as a "mind control worm" in some circles. These parasitic worms are found ...

Adult fruit fly brain infected with Wolbachia (in green). (Image by Brandt Warecki) Some parasites can hijack the behavior of the animals they infect. Grasshoppers colonized by hairworms will jump ...