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illustration of single-cell parasites floating through the bloodstream alongside blood cells The parasite Toxoplasma gondii hides in up to half of humans, although it rarely causes symptoms. But when ...

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 ...

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 ...

Deep in the caves of Ireland, scientists have discovered a mind-altering parasite that takes control of spiders, forcing them to abandon their webs before ultimately meeting a gruesome end. This newly ...

Wolves are pack animals, living in family groups led by a matriarch and her mate. Some wolves stay with their pack their whole lives, helping hunt and raise pups like aunts and uncles as they mature, ...