TED: On Being Just Crazy Enough

Comedian Joshua Walters, who’s bipolar, walks the line between mental illness and mental “skillness” in this funny, thought-provoking talk.

TED: A History of the Universe in Sound

Artist-technologist Honor Harger listens to the weird and wonderful noises of stars and planets and pulsars. In her work, she tracks the radio waves emitted by ancient celestial objects and turns them into sound.

TED: Different Ways of Knowing

Daniel Tammet has linguistic, numerical and visual synesthesia — meaning that his perception of words, numbers and colors are woven together into a new way of perceiving and understanding the world.

TED: A Future Beyond Traffic Gridlock

Bill Ford is a car guy — his great-grandfather was Henry Ford, and he grew up inside the massive Ford Motor Co. So when he worries about cars’ impact on the environment, and about our growing global gridlock problem, it’s worth a listen.

TED: Haunting Photos of Polar Ice

Photographer Camille Seaman shoots icebergs, showing the world the complex beauty of these massive, ancient chunks of ice. Dive in to her photo slideshow, “The Last Iceberg.”

TED: How I Became 100 Artists

How do you stage an international art show with work from 100 different artists? If you’re Shea Hembrey, you invent all of the artists and artwork yourself — from large-scale outdoor installations to tiny paintings drawn with a single-haired brush.

TED: Is Anatomy Destiny?

Alice Dreger works with people at the edge of anatomy, such as conjoined twins and intersexed people. In her observation, it’s often a fuzzy line between male and female, among other anatomical distinctions. Which brings up a huge question: Why do we let our anatomy determine our fate?

TED: The World’s First Charter City?

Paul Romer unveiled the idea for a “charter city” — a new kind of city with rules that favor democracy and trade. He tells the story of how such a city might just happen in Honduras…