A skunk sticks its tail straight up.

A skunk sticks its tail straight up.

Gross Science

Science & Nature

Digital Series

Gross Science

Science & Nature

Digital Series

Bizarre stories from the slimy, smelly, creepy world of science.

Watch this show and many more anytime, anywhere on the free PBS App.

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What Causes Runner's Diarrhea?

What Causes Runner's Diarrhea?

What Causes Runner's Diarrhea?

Ever get an uncontrollable urge to poop in the middle of a long run? You're not alone.

The Castrating Zombie Parasite

The Castrating Zombie Parasite

The Castrating Zombie Parasite

This parasite makes male crabs think that they’re pregnant females.