
Can Cat Poop Make You Crazy?
Clip: Season 45 Episode 102 | 3m 23sVideo has Closed Captions
Toxoplasma, a parasite found in cat waste, takes over the brain.
Toxoplasma, a parasite found in cat waste, takes over the brain.
Problems with Closed Captions? Closed Captioning Feedback
Problems with Closed Captions? Closed Captioning Feedback
National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.

Can Cat Poop Make You Crazy?
Clip: Season 45 Episode 102 | 3m 23sVideo has Closed Captions
Toxoplasma, a parasite found in cat waste, takes over the brain.
Problems with Closed Captions? Closed Captioning Feedback
How to Watch NOVA
NOVA is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, and Vizio.
Buy Now

NOVA Labs
NOVA Labs is a free digital platform that engages teens and lifelong learners in games and interactives that foster authentic scientific exploration. Participants take part in real-world investigations by visualizing, analyzing, and playing with the same data that scientists use.Providing Support for PBS.org
Learn Moreabout PBS online sponsorshipVideo has Closed Captions
Jack Gilbert studies the effects of the microbiome on the human body and mind. (6m 37s)
Researcher Raises Botflies Under Skin
"I felt an almost father-child relationship with this organism," the entomologist says. (3m 10s)
Microbes colonize our skin, guts, and bodies—but we wouldn’t be ourselves without them. (3m 43s)
Video has Closed Captions
Discover how a world of microbes living in and on you can make you sick. (28s)
Providing Support for PBS.org
Learn Moreabout PBS online sponsorshipNational Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.