TED-Ed Lesson: For most humans, farts are a welcome relief, an embarrassing incident, or an opportunity for a gas-based gag. But for many other creatures, farts are no laughing matter. Deep in the bowels of the animal kingdom, farts can serve as tools of intimidation, acts of self-defense, and weapons of malodorous murder. Nick Caruso and Dani Rabaiotti dig into the funky and foul world of animal flatulence.