Featuring the vocals and mischievous bell-playing of accordionist and singer Rachelle Garniez, the TED House Band -- led by Thomas Dolby on keyboard -- delivers this delightful rendition of the Edith Piaf standard "La Vie en Rose."

The Teresa Carreño Youth Orchestra contains the best high school musicians from Venezuela's life-changing music program, El Sistema. Led here by Gustavo Dudamel, they play Shostakovich's Symphony No. 10, 2nd movement, and Arturo Márquez' Danzón No. 2.

Nokia researcher Jan Chipchase's investigation into the ways we interact with technology has led him from the villages of Uganda to the insides of our pockets. He's made some unexpected discoveries along the way.

Four-star general Stanley McChrystal shares what he learned about leadership over his decades in the military. How can you build a sense of shared purpose among people of many ages and skill sets? By listening and learning -- and addressing the possibility of failure.

As humans, we can perceive less than a ten-trillionth of all light waves. "Our experience of reality," says neuroscientist David Eagleman, "is constrained by our biology." He wants to change that. His research into our brain processes has led him to create new interfaces -- such as a sensory vest -- to take in previously unseen information about...

Seth Godin argues the Internet has ended mass marketing and revived a human social unit from the distant past: tribes. Founded on shared ideas and values, tribes give ordinary people the power to lead and make big change. He urges us to do so.

Do you have a TED Talk inside, just bursting to come out? Take this tongue-in-cheek musical journey to "Give Your Talk." A musical love letter to our speakers -- written, directed and performed by the TED staff.

Eve Ensler, creator of "The Vagina Monologues," shares how a discussion about menopause with her friends led to talking about all sorts of sexual acts onstage, waging a global campaign to end violence toward women and finding her own happiness.

Filmmaker David Hoffman shares footage from his feature-length documentary Sputnik Mania, which shows how the Soviet Union's launch of Sputnik in 1957 led to both the space race and the arms race -- and jump-started science and math education around the world.

Colin Robertson had 3 minutes on the TED stage to tell the world about his solar-powered crowdsourced health care solution. And then...

Wendy Freedman led the construction of the Giant Magellan Telescope, a massive earthbound observatory.

The divisiveness plaguing American politics today is nothing new, says constitutional law scholar Noah Feldman. In fact, it dates back to the early days of the republic, when a dispute between Alexander Hamilton and James Madison led the two Founding Fathers to cut ties and form the country's first political parties. Join Feldman for some fascin...

In a moving and madly viral video last year, composer Eric Whitacre led a virtual choir of singers from around the world. He talks through the creative challenges of making music powered by YouTube, and unveils the first 2 minutes of his new work, "Sleep," with a video choir of 2,052. The full piece premiered a few weeks later (yes, on YouTube!).

Adam Savage talks about his fascination with the dodo bird, and how it led him on a strange and surprising double quest. It's an entertaining adventure through the mind of a creative obsessive.

As a democratic revolution led by tech-empowered young people sweeps the Arab world, Wadah Khanfar, the head of Al Jazeera, shares a profoundly optimistic view of what's happening in Egypt, Tunisia, Libya and beyond -- at this powerful moment when people realized they could step out of their houses and ask for change.

Some of the world's most baffling social problems, says Peter Eigen, can be traced to systematic, pervasive government corruption, hand-in-glove with global companies. In his talk, Eigen describes the thrilling counter-attack led by his organization, Transparency International.

An orchestra conductor faces the ultimate leadership challenge: creating perfect harmony without saying a word. In this charming talk, Itay Talgam demonstrates the unique styles of six great 20th-century conductors, illustrating crucial lessons for all leaders.

In this quick talk, visual artist Dread Scott tells the story of one of his most transgressive art installations, which drew national attention for its controversial use of the American flag and led to a landmark First Amendment case in the US Supreme Court.

Is there more than one universe? In this visually rich, action-packed talk, Brian Greene shows how the unanswered questions of physics (starting with a big one: What caused the Big Bang?) have led to the theory that our own universe is just one of many in the "multiverse."

A fantastic set of primers (with incredibly fun animations) all about what goes on in the brain.

Artist and TED Fellow Jae Rhim Lee re-imagines the relationships between the body and the world.

Human growth has strained the earth's resources, but as Johan Rockström reminds us, our advances also give us the science to recognize this and change behavior. His research has found nine "planetary boundaries" that can guide us in protecting our planet's many overlapping ecosystems.

The TED Fellows are an extraordinary group of 350+ artists, scientists, entrepreneurs and more — each at the beginning of a landmark career. Below, watch the most-viewed talks from these unusual trailblazers, each with a unique idea to share.

Sebastian Wernicke thinks every TED Talk can be summarized in six words. In this talk, he shows how to do just that -- and less.

With humor and persistence, filmmaker Morgan Spurlock dives into the hidden but influential world of brand marketing, on his quest to make a completely sponsored film about sponsorship. (And yes, onstage naming rights for this talk were sponsored too. By whom and for how much? He'll tell you.)

What do communities on the social, economic and environmental margins have in common? For one thing, they tend to be on the east sides of cities. In this short talk about a surprising insight, anthropologist and venture capitalist Stephen DeBerry explains how both environmental and man-made factors have led to disparity by design in cities from ...

Westpac's Michelle Knox has led large-scale transformation programs in the UK, Ireland and Australia.

Building sophisticated educational tools out of cheap parts, Johnny Lee demos his cool Wii Remote hacks, which turn the $40 video game controller into a digital whiteboard, a touchscreen and a head-mounted 3-D viewer.

Aaron Huey's effort to photograph poverty in America led him to the Pine Ridge Indian Reservation, where the struggle of the native Lakota people -- appalling, and largely ignored -- compelled him to refocus. Five years of work later, his haunting photos intertwine with a shocking history lesson.

Pioneering surgeon Susan Lim performed the first liver transplant in Asia. But a moral concern with transplants (where do donor livers come from ...) led her to look further, and to ask: Could we be transplanting cells, not whole organs? At the INK Conference, she talks through her new research, discovering healing cells in some surprising places.