Why do we use fluoride on our teeth?

What happens when you mix bleach and ammonia? Why does perfume smell amazing on one person and weird on another? And why is getting a job so hard right now? This week we’re answering a huge batch of listener questions about chemistry, sunscreen, scents, books, careers, birds, and ...  Show more

How do you turn a weird cloudy liquid into something stronger than steel? This week we’re telling the story of Kevlar: the chemistry breakthrough that led to bulletproof vests, firefighter gear, reinforced tires, and so much more. Along the way we talk polymers, hydrogen bonding, ...  Show more

From The Simpsons’ Big Book of British Smiles to Austin Powers’ ochre-tinged grin, American culture can’t stop bad-mouthing English teeth. But why? Are they worse than any other nation’s? June Thomas drills down into the origins of the stereotype, and discovers that the different ...  Show more

On this episode: Jamilah Lemieux and Zak Rosen are joined by Willa Paskin, host of Slate’s Decoder Ring. The three talk about the beauty of weird little rituals, and help a listener through her ick of tooth fairy-ing. Listen to Decoder Ring’s episode: Who Owns the Tooth Fairy?Jam ...  Show more

Over the course of millions of years, human voices have evolved to hold startling power. These clouds of vibrating air carry crucial information about who we are–and we rely on them to push ourselves up and out into the physical world.

This week, we’re on a journey to un ...

Funding cuts and research censorship have shaken the foundations of America’s health and science agencies, leaving researchers shocked, confused, and afraid. In this episode of Unexplainable, we ask, what does this mean for the future of science? This episode was hosted and produ ...  Show more