MIT researcher Deb Roy wanted to understand how his infant son learned language -- so he wired up his house with videocameras to catch every moment (with exceptions) of his son's life, then parsed 90,000 hours of home video to watch "gaaaa" slowly turn into "water."...

Anger researcher Ryan Martin draws from a career studying what makes people mad to explain some of the cognitive processes behind anger -- and why a healthy dose of it can actually be useful. "Your anger exists in you ... because it offered your ancestors, both human...

Good design looks great, yes -- but why shouldn't it also feel great, smell great and sound great? Designer Jinsop Lee (a TED Talent Search winner) shares his theory of 5-sense design, with a handy graph and a few examples. His hope: to inspire you to notice great...

00Sound design is built on deception -- when you watch a movie or TV show, nearly all of the sounds you hear are fake. In this audio-rich talk, Tasos Frantzolas explores the role of sound in storytelling and demonstrates just how easily our brains are fooled by what...

The Chinese internet has grown at a staggering pace -- it now has more users than the combined populations of the US, UK, Russia, Germany, France and Canada. Even with its imperfections, the lives of once-forgotten populations have been irrevocably elevated because of...

Democracy thrives on civil debate, Michael Sandel says -- but we're shamefully out of practice. He leads a fun refresher, with TEDsters sparring over a recent Supreme Court case (PGA Tour Inc. v. Martin) whose outcome reveals the critical ingredient in justice....

At this school in Tokyo, five-year-olds cause traffic jams and windows are for Santa to climb into. Meet: the world's cutest kindergarten, designed by architect Takaharu Tezuka. In this charming talk, he walks us through a design process that really lets kids be kids....

Facebook's "like" and "share" buttons are seen 22 billion times a day, making them some of the most-viewed design elements ever created. Margaret Gould Stewart, Facebook's director of product design, outlines three rules for design at such a massive scale—one so big...

What's haunting Carrie Poppy? Is it ghosts or something worse? In this talk, the investigative journalist narrates her encounter with a spooky feeling you'll want to warn your friends about and explains why we need science to deal with paranormal activity....

Adults tend to think of kids as "future citizens" -- their ideas and opinions will matter someday, just not today. But kids make up a quarter of the population, so shouldn't they have a say in what the world they'll inherit will look like? Urban planner Mara Mintzer...