IRC-Galleria

At 18, Natalie WarneÂ’s work with the Invisible Children movement made her a hero for young activists. At TEDxTeen she uses her inspiring story to remind us that no one is too young to change the world.

When she was 19, Amy Purdy lost both her legs below the knee. And now ... she's a pro snowboarder. In this powerful talk, she shows us how to draw inspiration from life's obstacles.

Charlie Todd causes bizarre, hilarious, and unexpected public scenes: Seventy synchronized dancers in storefront windows, "ghostbusters" running through the New York Public Library, and the annual no-pants subway ride. At TEDxBloomington he shows how his group, Improv Everywhere, uses these scenes to bring people together.

Behavioral economist Dan Ariely, the author of Predictably Irrational, uses classic visual illusions and his own counterintuitive (and sometimes shocking) research findings to show how we're not as rational as we think when we make decisions.

In a world of too many options and too little time, our obvious choice is to just ignore the ordinary stuff. Marketing guru Seth Godin spells out why, when it comes to getting our attention, bad or bizarre ideas are more successful than boring ones.

John Hunter puts all the problems of the world on a 4'x5' plywood board -- and lets his 4th-graders solve them. At TED2011, he explains how his World Peace Game engages schoolkids, and why the complex lessons it teaches -- spontaneous, and always surprising -- go further than classroom lectures can.

Natalie MacMaster and her musical partner Donnell Leahy play several tunes from the Cape Breton tradition -- a sprightly, soulful style of folk fiddling. It's an inspired collaboration that will have you clapping (and maybe dancing) along.

Stacey Kramer offers a moving, personal, 3-minute parable that shows how an unwanted experience -- frightening, traumatic, costly -- can turn out to be a priceless gift.

Pollination: it's vital to life on Earth, but largely unseen by the human eye. Filmmaker Louie Schwartzberg shows us the intricate world of pollen and pollinators with gorgeous high-speed images from his film "Wings of Life," inspired by the vanishing of one of nature's primary pollinators, the honeybee.

The LXD (the Legion of Extraordinary Dancers) electrify the TED2010 stage with an emerging global street-dance culture, revved up by the Internet. In a preview of Jon ChuÂ’s upcoming Web series, this astonishing troupe show off their superpowers.