The “alien” is actually a potato. Specifically, it is a purple tuber nicknamed Spudnik-1, grown and photographed by Pettit.

A new Nature study shows how parasite-driven inflammation in the gut activates a tuft cell to serotonin to vagus nerve pathway, helping explain why infection can suppress appetite. Study: Parasites ...

Anyone who has weathered a bad stomach bug knows the feeling: a loss of appetite that sets in and lingers, even after the initial illness. For the millions of people around the world who are ...

Add Yahoo as a preferred source to see more of our stories on Google. A tree tunnel in the Puna district of the island of Hawaii, also known as the Big Island. (Peter Unger/Getty Images) The parasite ...

The parasite that causes rat lungworm disease, long associated with Hawaii, was detected in California at the San Diego Zoo, raising concerns that the debilitating illness could become more widespread ...

SAN DIEGO — Brain-eating worms known as "rat lungworm" have been found in San Diego County, the first time the parasitic worms have been found in any state west of Texas. According to new research ...

Alien: Earth received glowing reviews from fans and critics when it touched down on FX last August, and it didn't take long before we learned that Season 2 was officially in the works. That news came ...

A parasite that may already be hiding in your brain has a shocking survival trick: it can infect the very immune cells sent to destroy it. Yet most people never get sick, and new research from UVA ...