TED Fellow and journalist Evgeny Morozov punctures what he calls iPod liberalism the assumption that tech innovation always promotes freedom, democracy with chilling examples of ways the Internet helps oppressive regimes stifle dissent.

Usman Riaz is a 21 year old whiz at the percussive guitar, a style he learned to play by watching his heroes on YouTube. The TED Fellow plays onstage at TEDGlobal 2012 followed by a jawdropping solo from the master of percussive guitar, Preston Reed. And watch these two guitarists take on a very spur of the moment improv.

TED Fellow Abigail Washburn wanted to be a lawyer improving US China relations until she picked up a banjo. She tells a moving story of the remarkable connections she's formed touring across the United States and China while playing that banjo and singing in Chinese.

Haiti was not a natural disaster, says TED Fellow Peter Haas It was a disaster of engineering. As the country rebuilds after January's deadly quake, are bad old building practices creating another ticking time bomb? Haas's group, AIDG, is helping Haiti's builders learn modern building and engineering practices, to assemble a strong country brick by brick.

Artist and TED Fellow Aparna Rao re imagines the familiar in surprising, often humorous ways. With her collaborator Soren Pors, Rao creates high tech art installations a typewriter that sends emails, a camera that tracks you through the room only to make you invisible on screen that put a playful spin on ordinary objects and interactions.

TED Fellow Lucy McRae is a body architect she imagines ways to merge biology and technology in our own bodies. In this visually stunning talk, she shows her work, from clothes that recreate the body's insides for a music video with pop star Robyn, to a pill that, when swallowed, lets you sweat perfume.

Anemia is a major and completely preventable cause of deaths in childbirth in many places around the world, but the standard test is invasive and slow. In this witty and inspiring talk, TED Fellow Myshkin Ingawale describes how he and his team created a simple, portable, low cost device that can test for anemia without breaking the skin.