Brains On! Science podcast for kids · Brains On Universe

Why do skunks stink?

January 6, 2026·31 min·2 clips

A skunk expert got sprayed up to 100 times and compares the smell to raw garlic.

This episode of Brains On! explores the science behind skunk spray and the biology of these misunderstood mammals. Host Molly Bloom is joined by co-host Dia from Cupertino, who shares a personal story about a "skunk invasion" at her school. The episode features interviews with two skunk experts: wildlife biologist Marie Tosa and Professor Ted Stankiewicz. Marie Tosa studied the western spotted skunk, a squirrel-sized carnivore with distinctive white spots and stripes. Her research in Pacific Northwest forests revealed these skunks are generalist predators that eat wasps, yellow jackets, chipmunks, and flying squirrels. She notes western spotted skunk spray has a uniquely pungent, raw garlic-like scent compared to other skunks. Professor Ted Stankiewicz explains that skunks use their powerful spray solely as a last-resort defense against predators like coyotes and mountain lions. Skunks possess large anal glands filled with a golden oil containing sulfur compounds, the same element that gives rotten eggs their smell. A key ingredient in the spray is thioacetate, which only becomes intensely stinky when mixed with water. Before spraying, skunks perform warning behaviors like arching their backs, stamping their feet, or charging slightly. Their iconic black-and-white stripes act as a bold warning signal to other animals in the wild. The episode clarifies that the common tomato juice remedy is ineffective, instead recommending a mixture of hydrogen peroxide, baking soda, and dish soap to neutralize the odor. A whimsical wombat character presents a mnemonic device—"Four cats had problems. Queen coughed beside Susie's tenth lasagna. Don't sneeze"—to remember this recipe. Skunks evolved this defense because their major predators rely heavily on a keen sense of smell for nighttime hunting. The spray causes burning pain and temporarily ruins a predator's ability to smell, making it a highly effective deterrent. Skunks can deplete their limited spray supply, so they conserve it carefully. The episode includes a mystery sound segment, later revealed to be the aggressive lint-rolling of a pair of pants. Listeners also share creative hypothetical animal defense mechanisms, such as launching guitar solos or deploying camouflage. The tone is playful, educational, and highly conversational, blending factual science with humorous character segments and listener contributions. Young science enthusiasts and curious kids who enjoy lively, interactive learning will love this episode. Listeners seeking a purely serious, formal science lecture might find the whimsical segments less appealing.

As heard by us

Skunk stink becomes a compact lesson in defense, smell, and why surprise parties fail.

Brains On! turns a skunk question into a lively lesson about smell and defense. It starts on the road and settles into Dia and Molly's conversation with Marie Tosa, making one point plain: skunks are not always stinky, most of the time they smell fine, and their scent gives them…

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Why you'd press play

You get skunk spray talk, a surprise-party warning, and Wombat Pete trying to turn chaos into a flyer.

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