Athlete, actor and activist Aimee Mullins talks about her prosthetic legs -- she's got a dozen amazing pairs -- and the superpowers they grant her: speed, beauty, an extra 6 inches of height ... Quite simply, she redefines what the body can be.

This demo -- from Pattie Maes' lab at MIT, spearheaded by Pranav Mistry -- was the buzz of TED. It's a wearable device with a projector that paves the way for profound interaction with our environment. Imagine "Minority Report" and then some.

This demo -- from Pattie Maes' lab at MIT, spearheaded by Pranav Mistry -- was the buzz of TED. It's a wearable device with a projector that paves the way for profound interaction with our environment. Imagine "Minority Report" and then some.

This demo -- from Pattie Maes' lab at MIT, spearheaded by Pranav Mistry -- was the buzz of TED. It's a wearable device with a projector that paves the way for profound interaction with our environment. Imagine "Minority Report" and then some.

In this talk from 2003, design critic Don Norman turns his incisive eye toward beauty, fun, pleasure and emotion, as he looks at design that makes people happy. He names the three emotional cues that a well-designed product must hit to succeed.

In this talk from 2003, design critic Don Norman turns his incisive eye toward beauty, fun, pleasure and emotion, as he looks at design that makes people happy. He names the three emotional cues that a well-designed product must hit to succeed.

Eric Lewis, an astonishingly talented crossover jazz pianist -- seen by many for the first time at TED2009 -- sets fire to the keys with his shattering rendition of Evanescence's chart-topper, "Going Under."

Eric Lewis, an astonishingly talented crossover jazz pianist -- seen by many for the first time at TED2009 -- sets fire to the keys with his shattering rendition of Evanescence's chart-topper, "Going Under."

Eric Lewis, an astonishingly talented crossover jazz pianist -- seen by many for the first time at TED2009 -- sets fire to the keys with his shattering rendition of Evanescence's chart-topper, "Going Under."

Mike Rowe, the host of "Dirty Jobs," tells some compelling (and horrifying) real-life job stories. Listen for his insights and observations about the nature of hard work, and how it’s been unjustifiably degraded in society today.

Mike Rowe, the host of "Dirty Jobs," tells some compelling (and horrifying) real-life job stories. Listen for his insights and observations about the nature of hard work, and how it’s been unjustifiably degraded in society today.

A unique ecosystem of plants, birds and monkeys thrives in the treetops of the rainforest. Nalini Nadkarni explores these canopy worlds -- and shares her findings with the world below, through dance, art and bold partnerships.

A unique ecosystem of plants, birds and monkeys thrives in the treetops of the rainforest. Nalini Nadkarni explores these canopy worlds -- and shares her findings with the world below, through dance, art and bold partnerships.

A unique ecosystem of plants, birds and monkeys thrives in the treetops of the rainforest. Nalini Nadkarni explores these canopy worlds -- and shares her findings with the world below, through dance, art and bold partnerships.

By piecing together a complex ecological puzzle, biologist Willie Smits has found a way to re-grow clearcut rainforest in Borneo, saving local orangutans -- and creating a thrilling blueprint for restoring fragile ecosystems.

By piecing together a complex ecological puzzle, biologist Willie Smits has found a way to re-grow clearcut rainforest in Borneo, saving local orangutans -- and creating a thrilling blueprint for restoring fragile ecosystems.

By piecing together a complex ecological puzzle, biologist Willie Smits has found a way to re-grow clearcut rainforest in Borneo, saving local orangutans -- and creating a thrilling blueprint for restoring fragile ecosystems.

A TED archive gem. At TED in 1998, Brenda Laurel asks: Why are all the top-selling videogames aimed at little boys? She spent two years researching the world of girls (and shares amazing interviews and photos) to create a game that girls would love.

A TED archive gem. At TED in 1998, Brenda Laurel asks: Why are all the top-selling videogames aimed at little boys? She spent two years researching the world of girls (and shares amazing interviews and photos) to create a game that girls would love.

In the year leading up to this talk, the web tool Twitter exploded in size (up 10x during 2008 alone). Co-founder Evan Williams reveals that many of the ideas driving that growth came from unexpected uses invented by the users themselves.