University of Maryland, Baltimore County, president Freeman Hrabowski; St. John's philosophy professor Laura Snyder; behavioral economist Colin Camerer; "Jeopardy!" champion Ken Jennings.
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Jason Fried (37signals); behavioral economist Dan Ariely; Wingham Rowan (Slivers of Time); work-life balance expert Nigel Marsh.
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Biomedical engineer Nina Tandon; InSightec chief systems architect Yoav Medan; HIV researcher Boghuma Kabisen Titanji; geneticist Francis S. Collins; Medicines Patent Pool founder Ellen 't Hoen.
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North Korean refugee-activist Hyeonseo Lee; legal scholar Lawrence Lessig; property-valuation expert Afra Raymond; Libyan Women's Platform for Peace founder Zahra' Langhi.
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Biologist Allan Savory; former Michigan governor Jennifer Granholm; anthropologist Wade Davis; Phoenix Commotion founder Dan Phillips.
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Education expert Sugata Mitra; education researcher Andreas Schleicher; Microsoft chairman Bill Gates; epidemiologist Nathan Wolfe.
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Rock star Bono on ending poverty. Also: social entrepreneur Dan Pallotta; Kenyan education activist Kakenya Ntaiya; surgeon Steven Schwaitzberg.
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PayPal, Tesla Motors and SpaceX founder Elon Musk is interviewed by TED curator Chris Anderson. Also: composer Eric Whitacre; environmentalist Stewart Brand; and experimental micromechanics pioneer Erik Schlangen.
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Complex systems theorist James B. Glattfelder; former Tirana, Albania, mayor Edi Rama; Zipcar founder Robin Chase; economist-global strategist Pankaj Ghemawat.
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Scientist Miguel Nicolelis; underwater wheelchair athlete Sue Austin; Biotechonomy CEO Juan Enriquez; paleontologist Jack Horner.
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Family therapist Esther Perel; writer Jenna McCarthy; anthropologist Helen Fisher; singer-songwriter Nellie McKay.
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Jeweler John Hardy, who founded the Green School in Bali; neuroscientist Beau Lotto and student scientist Amy O'Toole; Mitch Resnick, the director of the Lifelong Kindergarten group at the MIT Media Lab; Tyler Dewitt, a former science instructor.
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10x10 global ambassador Shabana Basij-Rasikh; author Leslie Morgan Steiner ("Crazy Love"); author Isabel Allende ("Maya's Notebook"); writer Shereen El-Feki.
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Author-illustrator Jarrett J. Krosoczka; filmmaker Louie Schwartzberg; sculptor Antony Gormley; artist-filmmaker Miru Kim.
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Dermatologist Richard Weller; cognitive researcher Daphne Bavelier; biotech entrepreneur Hadyn Parry; Dr. Peter Saul.
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Equal Justice Initiative executive director Bryan Stevenson; Sustainable South Bronx founder Majora Carter; Liberian peace activist Leymah Gbowee.
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Psychologist Jonathan Haidt; business journalist Adam Davidson; Team Rubicon cofounder Jake Wood; psychologist David Pizarro.
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Rhode Island School of Design president John Maeda; Metropolitan Museum of Art director Thomas P. Campbell; choreographer Wayne McGregor; Design That Matters CEO Timothy Prestero.
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Sustainable economic development expert Ernesto Sirolli; World Bank Institute vice president Sanjay Pradhan; social innovator Rachel Botsman; transport systems analyst Jonas Eliasson.
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Bat expert Emma Teeling; primatologist Frans de Waal; entomologist Marcus Byrne; filmmaker Louie Schwartzberg ("Wings of Life").
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Cross-country skier Janine Shepherd; MIT mechanical engineer Amos Winter; New York Stem Cell Research Foundation CEO Susan Solomon; evolutionary biologist Jonathan Eisen.
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Conductor Benjamin Zander; multi-instrumentalist Andrew Bird; soprano Charity Tillemann-Dick.
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Tightrope walker Philippe Petit; illusionist Marco Tempest; quantum physicist Boaz Almog; illusionist David Blaine.
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British Museum director Neil MacGregor; photo retoucher Becci Manson; art detective Maurizio Seracini; radio host Julie Burstein.
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Author Jeff Hancock; journalist Andrew Blum; computer scientist Luis von Ahn; programmer John Graham-Cumming.
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Consent to Research Project leader John Wilbanks; physician Ben Goldacre; violinist Robert Gupta; neuroscientist Read Montague.
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Actor and filmmaker Jarreth Merz; journalist Heather Brooke; educator and author Clay Shirky; British MP Rory Stewart.
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Robotics experts Vijay Kumar, Dennis Hong and Rodney Brooks; artist Aparna Rao.
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Social psychologist Amy Cuddy; business expert Eddie Obeng; Harvard Business School professor Andrew McAfee; IDEO chairman David Kelley.
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Cognitive neuroscientist Sarah-Jayne Blakemore; forensic psychologist Scott Fraser; writer-documentary filmmaker Jon Ronson; artist-designer Candy Chang.
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Percussive guitarists Usman Riaz and Stefon Harris perform. Harris also discusses and demonstrates "mistakes" with his jazz quartet; and composer Mark Applebaum discusses his approach to writing music. Also: a performance by Quixotic Fusion, a mixed media-theater-aerialist company.
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Speakers include journalist Misha Glenny, who discusses organized crime and cyber criminals; and global security expert Marc Goodman.
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Neuroscientist and stroke survivor Jill Bolte Taylor; mathematician Max Little, who's developed a tool that can detect Parkinson's disease from voice recordings; legal scholar Elyn Saks, who has schizophrenia; psychologist-autism expert Ami Klin.
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Guitarist Usman Riaz; vibraphonist Stefon Harris; Quixotic Fusion's Anthony Magliano and Mica Thomas.
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Stunt coordinator Steve Truglia; Lauren Zalaznick (NBC Universal); Silicon Valley executive-entrepreneur Peter Hirschberg.
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Writer-director Andrew Stanton; special-effects expert Peter Legato; filmmaker Beeban Kidron; MIT Media Lab professor Ramesh Raskar.
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Speakers include bee expert Noah Wilson-Rich; spider-silk expert Cheryl Hayashi; conservation biologist Dee Boersma; and economist Pavan Sukhdev.
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Speakers include oncologist Jay Bradner; biologist Mina Bissell, who specializes in cancer research; Novocure executive chairman William F. Doyle; and transmissible-cancer researcher Elizabeth Murchison.
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Speakers include journalist Megan Kamerick; author-illustrator Maira Kalman; author-journalist Gayle Tzemach Lemmon; and poet Sarah Kay.
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Speakers include Chinese blogger Michael Anti; Massimo Banzi, who helped to create open-source microcontrollers; Copenhagen Institute of Interaction Design cofounder Vinay Venkatraman; and cyber-security expert Ralph Langner.
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Speakers include journalist John Hockenberry; artist Shea Hembrey; graphic designer Stefan Sagmeister; and comedian John Hodgman.
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Mentalist Keith Barry; augmented-reality expert Matt Mills; plant neurobiologist Stefano Mancuso; neuroscientist Tali Sharot.
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Physicist Brian Greene; archaeologist Sarah Parcak, who searches for lost civilizations using satellite images; cosmologist Sean Carroll; astronomer Phil Plait.
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DARPA director Regina Dugan; neuroscientist Sheila Nirenberg; pilot Anna Mracek Dietrich, who is involved in making a flyable car; Digital Forming cofounder Lisa Harouni.
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Dr. Atul Gawande, who writes for the New Yorker; Reuters Health executive Ivan Oransky; Health Leads founder Rebecca Onie; engineer-entrepreneur Tal Golesworthy.
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Rocky Mountain Institute cofounder Amory Lovins; Rio de Janeiro mayor Eduardo Paes; illusionist Marco Tempest; Swiss pilot Yves Rossy.
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Research professor Brene Brown; cardiologist Noel Bairey Merz; longevity expert Laura Carstensen; business psychologist Michael Norton.
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San Francisco Symphony conductor Michael Tilson Thomas; sculptor Reuben Margolin; graphic artist Chip Kidd; Studio Museum in Harlem chief curator Thelma Golden.
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Science journalist Joshua Foer; psychologist Daniel Kahneman; Good Think CEO Shawn Achor; psychologist Philip Zimbardo.
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Fraud examiner Pamela Meyer; Dress for Success founder Nancy Lublin; author Susan Cain ("Quiet: The Power of Introverts in a World That Can't Stop Talking").
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Columbia Business School professor Sheena Iyengar; theoretical physicist Garrett Lisi; surgeon Sherwin Nuland.
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PostSecret.com founder Frank Warren; advertising executive Rory Sutherland; clinical psychologist Sherry Turkle; cybersecurity expert Mikko Hypponen.
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Physicist Janna Levin; planetary scientist Carolyn Porco; astrophysicist Andrea Ghez; quantum physicist Aaron O'Connell.
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Wildlife filmmakers Beverly and Dereck Joubert; biologist-photographer Paul Nicklen; Namibian conservationist John Kasaona; biologist Juliana Machado Ferreira.
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Global Voices cofounder Ethan Zuckerman; artist-computer scientist Jonathan Harris; former MoveOn.org executive director Eli Pariser; scientist Harald Haas.
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Global-health expert Hans Rosling; Kiva.org cofounder Jessica Jackley; futurist Alex Steffen; educator-activist Tony Porter.
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Anthropologist Wade Davis; economist Paul Romer; Common Good founder Philip K. Howard.
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Physician Abraham Vergese; epidemiologist Ben Goldacre; Lions Aravind Institute of Community Ophthalmology executive director Thulasiraj Ravilla; mother-and-daughter doctors Hawa Abdi and Dego Mohamed, who run a medical clinic in Somalia.
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Designer Yves Behar; Moller SkyCar innovator Paul Moller; roboticist Cynthia Breazeal; biologist Robert Full.
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Architects Carlo Ratti and Thomas Heatherwick; designer Marian Bantjes; biomedical engineer Fiorenzo Omenetto.
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Environmentalist Stewart Brand; venture capitalist John Doerr; conservationist Willie Smits; atmospheric chemist Rachel Pike.
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Flight 1549 passenger Ric Elias; political scientist Samantha Power; Buddhist teacher Joan Halifax; sustainability expert Louise Fresco.
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Folk musician-storyteller David Holt; musical innovator Andrew Bird; singer-songwriter Kaki King.
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Micro sculptor Willard Wigan; digital artist Aaron Koblin; performance artist Natasha Tsakos; art collector Ravin Agrawal.
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Journalist and "wrongologist" Kathryn Schulz; Institute of Medicine president Harvey Fineberg; actor Thandie Newton; comedian John Lloyd.
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Peace activist Jeremy Gilley; counter-extremism activist Maajid Nawaz; Chinese TV personality Yang Lan; educator Roy Gould and Microsoft researcher Curtis Wong.
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Physician-statistician Hans Rosling; Annie Lennox; molecular biologist Bonnie Bassler; anthropologist Wade Davis.
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"Minority Report" science adviser John Underkoffler; historian Edward Tenner; Internet pioneer Tim Berners-Lee; 4chan founder Christopher "Moot" Poole.
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NESTA chief executive Geoff Mulgan; cognitive scientist Steven Pinker; writer Anil Gupta; sound expert Julian Treasure.
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David Byrne explores the role that a venue plays in music innovation.
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Coral reef ecologist Jeremy Jackson; underwater filmmaker-photographer Mike deGruy; Kristina Gjerde, an expert on the law of the high seas; marine researcher Charles Moore.
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Philosopher Michael Sandel; psychologist Jonathan Haidt; former British prime minister Gordon Brown.
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Visual neuroscientist Pawan Sinha; biochemist Mark Roth; neurologist Oliver Sacks.
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Josette Sheeran (UN World Food Programme); Cary Fowler (Global Crop Diversity Trust); architect Carolyn Steel; Dr. Dean Ornish; Graham Hill (Treehugger.com).
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Science writer Matt Ridley; neuroscientist Beau Lotto; telecommunications entrepreneur Tan Le; anthropologist Helen Fisher.
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Computer security expert Mikko Hyppönen; Rebecca MacKinnon (New America Foundation); former British prime minister Gordon Brown; ethnographer Stefana Broadbent.
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Ford executive chairman Bill Ford; adventurer Bertrand Piccard; robotics expert Markus Fischer; natural science writer Janine Benyus.
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World Peace Game inventor John Hunter; British politician Rory Stewart ("Can Intervention Work?"); author Parag Khanna ("How to Run the World").
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Playwright Eve Ensler; poet Sarah Kay; actor Sarah Jones.
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Author Steven Johnson ("Where Good Ideas Come From"); technology theorist Tom Chatfield; neuroscientist Rebecca Saxe; HealthTap founder-CEO Ron Gutman.
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Ocean rower Roz Savage; environmentalist Rob Dunbar; photojournalist Brian Skerry; environmentalist Dianna Cohen.
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Dr. Bruce Aylward (Global Polio Eradication Initiative); Dr. Mitchell Besser, founder of the South African peer HIV-education program mother2mother; neuroscientist Gero Miesenboeck, a pioneer in the field of optogenetics.
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Former secretary of state Madeleine Albright; journalist Courtney Martin; Acumen Fund founder Jacqueline Novogratz; activist Caroline Casey.
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Robotics expert Dennis Hong; neuroscientist Ed Boyden; regenerative medicine expert Anthony Atala; epidemiologist Nathan Wolfe.
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Al Jazeera director general Wadah Khanfar; Egyptian Internet activist Wael Ghonim; Centre for Well-Being founder Nic Marks; economist Alex Tabarrok.
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Film critic Roger Ebert; neuroscientist Ed Boyden; pain-management expert Elliot Krane; marine biologist Edith Widder.
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The Handspring Puppet Company; French street artist JR; composer Eric Whitacre.
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Environmentalist Majora Carter discusses her efforts in the South Bronx; political analyst Nate Silver discusses race and politics.
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Environmentalist Stewart Brand discusses cities, nuclear power, genetic modification and geoengineering.
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Education expert Salman Khan (Khan Academy); cognitive scientist Deb Roy; columnist David Brooks (New York Times).
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Acumen Fund founder Jacqueline Novogratz relates her encounter with a former prostitute in a Nairobi slum; playwright Eve Ensler ("The Vagina Monologues") discusses a global campaign to end violence against women.
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Natalie Merchant performs selections from her 2010 "Leave Your Sleep" album, which sets children's poetry to music.
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Writer Dave Eggers; software engineer Tom Wujec; Mathematica creator Stephen Wolfram; preteen writer Adora Svitak.
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Psychologist Martin Seligman on the study and practice of psychology; Dr. Dean Ornish on eating habits.
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Mixed-media artist Miwa Matreyek; digital-effects expert Ed Ulbrich; computer-animation expert Torsten Reil; game expert Peter Molyneux.
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Behavioral economist Dan Ariely; writer Alain de Botton; graphic designer Stefan Sagmeister; journalist Becky Blanton.
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Natasha Tsakos presents her one-woman "Uptake" show. Also: a presentation by artist Olafur Eliasson.
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Endangered species are discussed by anthropologist Wade David. Also: David Byrne performs "(Nothing but) Flowers."
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Food scientist Heribert Watzke; Blue Brain director Henry Markram; inventor Pranav Mistry; design critic Don Norman.
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Wildlife filmmakers Beverly and Dereck Joubert on life lessons that can be drawn from big cats; technologist Joshua Klein on the intelligence of crows.
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Bill Gates discusses the world's energy future.
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Chef Jamie Oliver on his antiobesity efforts; CD Baby founder Derek Sivers on how movements get started.
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Mythologist Devdutt Pattanaik on the myths of the East and the West; writer Shereen El Feki on the Arab world and Western pop culture.
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Journalist Naomi Klein; jeweler John Hardy, who founded the Green School in Bali; historian Joseph Nye; scientist Richard Sears.
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Marine biologists Peter Tyack, Barbara Block and Greg Stone.
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Babble founders Rufus Griscom and Alisa Volkman; design expert Emily Pilloton; Wolfram Research strategic director Conrad Wolfram; cyborg anthropologist Amber Case.
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Oceanographer John Delaney; marine ecologist Enric Sala; marine biologist Edith Widder.
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Dr. Deborah Rhodes, the director of the Mayo Clinic's Executive Health Program; Facebook COO Sheryl Sandberg; journalist Hanna Rosin; cartoonist Liza Donnelly.
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Industrial designer Mathieu Lehanneur; physicist Patricia Burchat; author Michael Specter; composer JoAnn Kuchera-Morin.
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Hip-hop performer Emmanuel Jal; percussionist Sivamani; classical Indian dancer Ananda Shankar Jayant; Arab-culture writer Shereen El Feki.
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Photographers Yann Arthus-Bertrand, Ryan Lobo, Tayrn Simon and David Griffin.
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Humorist John Hodgman; comic Rory Bremner; Planetwalk founder John Francis; comedian Julia Sweeney.
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Regenerative-medicine pioneer Alan Russell; robotic surgeon Catherine Mohr; inventor Nathan Myhrvold; medical advocate Allison Hunt.
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Sociologist Nicholas Christakis ("Connected"); new media expert Clay Shirky; performance artist Ze Frank; Microsoft technical fellow Gary Flake.
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Sustainability innovator Rachel Armstrong. Also: architects Joshua Prince-Ramus, Bjarke Ingels and Magnus Larsson.
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Global Fund for Women president Kavita Ramdas; journalist Sheryl WuDunn ("Half the Sky"); Indian anti-trafficking activist Sunitha Krishnan; singer Imogen Heap.
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James Cameron and J.J. Abrams discuss their childhood inspirations. Also: producer Jeff Skoll ("An Inconvenient Truth"); artist Theo Jansen.
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Psychologist Barry Schwartz ("The Paradox of Choice"); economist Tim Jackson ("Prosperity Without Growth"); Young Foundation director Geoff Mulgan.
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Dr. Temple Grandin, the Colorado State professor of animal science who has autism, discusses how her mind works. Also: Sebastian Seung, a professor of computational neuroscience at MIT; Skeptic magazine founder Michael Shermer.
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The pros and cons of nuclear energy are debated by environmentalist Stewart Brand and Stanford professor Mark Z. Jacobson. Also: Rob Hopkins, the founder of the Transition movement; environmental entrepreneur Shai Agassi.
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Inventor Robert Fischell; cancer researcher William Li; orthopedic surgeon Kevin Stone; Sound Agency chairman Julian Treasure.
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Artist Golan Levin discusses his interactive works. Also: the a cappella group Naturally 7 perform.
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Game designer Jane McGonigal; social theorist Jonathan Zittrain; TED curator Chris Anderson.
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International AIDS Vaccine Initiative president Seth Berkley; author Laurie Garrett ("The Coming Plague"); physician Dean Ornish.
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Center for SETI Research director Jill Tarter; physicist Freeman Dyson; astronomer Dimitar Sasselov.
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Herbie Hancock; Eddi Reader; Natalie Merchant.
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Cognitive researcher Nancy Etcoff; singer-songwriter Sophie Hunger; David Byrne.
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The Legion of Extraordinary Dancers; Indian dancer-actor-politician Mallika Sarabhai; violinist Robert Gupta; jazz pianist Eric Lewis.
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Creativity expert Ken Robinson; mathematician Arthur Benjamin; career analyst Dan Pink; Bennington College president Liz Coleman.
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Speakers include education expert Sugata Mitra; writer Elizabeth Gilbert; and chef Jamie Oliver.
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Speakers include psychologist Martin Seligman; ecologist Nalini Nadkarni; and behavioral economist Sendhi Mullainathan.
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Speakers include architect Daniel Libeskin; pianist Jose Antonio Abreu, who founded a youth orchestra in Venezuela; and oncologist David Agus.
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Speakers include Bill Gates of the Bill and Melinda Gates Foundation; Idealab founder Bill Gross; and wingsuit jumper Ueli Gegenschatz.
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Speakers include ocean researcher Sylvia Earle; runner Aimee Mullins, who was born without shinbones; and Dan Buettner, who studies communities where people live past age 100.
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