Parasites

The microscopic nematodes known as vinegar eels move together in a strange synchronized swimming routine, new research videos show.

Scientists discovered a new type of parasitic worm that only infects the mouths of tarantula spiders.

Here are some of our favorite gross-outs in science news this year.

The pathogenic fungus Entomophthora muscae doesn't just kill the flies it infects; it also turns males into sex-crazed necrophiliacs.

Tongue-eating parasites chow down on fishes' mouths and eventually replace their tongues

Outstanding examples of stunning microscopy were recently honored in the Nikon Small World contest.

Scientists recently found that a fungus resembling zombies' fingers is more widespread in Australia than anyone suspected.

Some of this year's top science stories were truly the stuff of nightmares.

This parasite may manipulate your brain to make you take more risks.

Digital models of a fish skull revealed a parasitic stowaway inside its mouth: a "tongue biter" isopod that consumed and then replaced the fish's tongue.