Tammy Lally helps others master their finances.

Stuart Brown's research shows play is not just joyful and energizing -- it's deeply involved with human development and intelligence. Through the National Institute for Play, he's working to better understand its significance.

David Byrne builds an idiosyncratic world of music, art, writing and film.

About this event: In 2012, TEDxKyoto was launched in the spirit of ideas worth spreading. This leads us to ask the question - where do great ideas come from, and what brings them forth? On November 8, we gather together at TEDxKyoto to explore the intersection of courage and creativity. “There is no innovation and creativity without failure. Period.” - Brene Bro...

Brian Greene is perhaps the best-known proponent of superstring theory, the idea that minuscule strands of energy vibrating in a higher dimensional space-time create every particle and force in the universe.

Marcus Byrne is fascinated by the way insects, particularly the intrepid dung beetle, have hardwired solutions to the challenges posed by their environments. Could they help humans solve problems?

Once known for entertaining millions by creating special effects for Hollywood, theme parks and Broadway, Applied Minds cofounder Bran Ferren now solves impossible tech challenges with previously unimaginable inventions.

Novelist, writer, culture critic and playwright Monica Byrne thinks that there's an infinite number of stories to tell, and she intends to tell as many as she can.

Cambridge research professor Brian Little analyzes and redefines the threads of our personalities -- and suggests ways we can transform ourselves.

Nora Brown sings ballads and plays traditional old-time music with a heavy interest in eastern Kentucky banjo playing.

Sergey Brin is half of the team that founded Google.

Bruno Maisonnier founded Aldebaran Robotics, maker of the tiny, compelling humanoid Nao.

Artist Brian Dettmer digs into a good book (literally, with a knife) to create beautifully intricate forms that reflect how we see old information in a modern world.

David Baron writes about science in books, magazines, newspapers and for public radio. He formerly served as science correspondent for NPR and science editor for PRI’s The World.

After Robert Lang's talk on origami at TED2008, Bruno Bowden stepped onstage with a challenge -- he would fold one of Lang's astonishingly complicated origami figures, blindfolded, in under 2 minutes. He's accompanied by the cellist Rufus Cappadocia.

Bernie Dunlap is a true polymath, whose talents span poetry, opera, ballet, literature and administration. He is the president of South Carolina’s Wofford College.

An engineer with Google (he helped build Google Earth), Bruno Bowden is also an enthusiastic folder of paper.

Brian Skerry is a photojournalist who captures images that not only celebrate the mystery and beauty of the sea but also bring attention to the pressing issue which endanger our oceans.

Jackson Browne has written and performed some of the most literate and moving songs in popular music -- and has defined a genre of songwriting charged with honesty, emotion and personal politics.

A key player in the "Boston miracle" that lowered the rate of youth crime and gang violence, Rev. Jeffrey Brown is a Baptist minister.

TED Resident tobacco brown is a social artist working at the public intersection of environmental art and restorative justice.

Google co-founders Larry Page and Sergey Brin offer a peek inside the Google machine, sharing tidbits about international search patterns, the philanthropic Google Foundation, and the company's dedication to innovation and employee happiness.

UPDATED: To see all these talks at one click, check out our updated Playlist: The 20 Most Popular Talks of All Time. As 2013 draws to a close, TED is deeply humbled to have posted 1600+ talks, each representing an idea worth spreading. So which ideas have had the most widespread impact? Below, a look at the 20 most-watched talks as of Dec...

Deanna Van Buren is an architect who designs spaces for peacemaking, inside and out.

TED Prize winners turn ideas into world-changing projects, with $1 million in seed money and the TED community’s support. Beyond having a solid track record of making high-impact change in their communities and beyond, all prize winners must be capable of one thing: dreaming big. Does this sound like you or someone you know? This morni...

In April 2016, Rachel Dolezal spoke at an independently organized TEDx event held at a university. As you may know, Ms. Dolezal is a former president of the NAACP’s Spokane chapter who sparked a national debate and resigned after the public discovered that she was a white woman identifying herself as a black woman. Recently she announced on TV ...

David Byrne sings the Talking Heads' 1988 hit, "(Nothing But) Flowers." He's accompanied by Thomas Dolby and string quartet Ethel, who made up the TED2010 house band.

Technology architect Fadi Chehadé helped set up the infrastructure that makes the internet work -- essential things like the domain name system and IP address standards. Today he's focused on finding ways for society to benefit from technology. In a crisp conversation with Bryn Freedman, curator of the TED Institute, Chehadé discusses the ongoin...

TED is dedicated to ideas worth spreading. And that leaves many wondering exactly which ideas have been spread the most widely in the six years that TEDTalks videos have been available online. Here, a list of the 20 most-watched talks on all the platforms we track: TED.com, YouTube, iTunes, embed and download, Hulu and more, as of November 2...

What should modern leadership look like? Entrepreneur and former Icelandic presidential candidate Halla Tómasdóttir thinks global leaders need to change their ways -- or risk becoming irrelevant. In a conversation with curator Bryn Freedman, she shows how anybody can step up and make a difference, even if you don't yet have power. "There's a lea...