Carlo Ratti launches airborne pixels on little helicopters to make flying art.

Aaron Koblin shows a crowd-sourced Johnny Cash music video created frame by frame by volunteers …

Mattias Astrom demos C3, a new 3D mapping tech …

Mike Matas demos http://www.pushpoppress.com/ for the first time live onstage, at TED.

Chefs Homaru Cantu and Ben Roche on stage “and we are here to infiltrate your mouths.”

Magician Franz Harary spills a secret at TED: “If you can understand how people think, then, for a brief moment, you can control what they see.”

Photos: TED / James Duncan Davidson