William Noel: Revealing the lost codex of Archimedes

TEDxSummit

William Noel: Revealing the lost codex of Archimedes


How do you read a two-thousand-year-old manuscript that has been erased, cut up, written on and painted over? With a powerful particle accelerator, of course! Ancient books curator William Noel tells the fascinating story behind the Archimedes palimpsest, a Byzantine prayer book containing previously-unknown original writings from ancient Greek mathematician Archimedes and others.

David MacKay: A reality check on renewables

TEDxWarwick

David MacKay: A reality check on renewables


How much land mass would renewables need to power a nation like the UK? An entire country's worth. In this pragmatic talk, David MacKay tours the basic mathematics that show worrying limitations on our sustainable energy options and explains why we should pursue them anyway. (Filmed at TEDxWarwick.)

Ken Goldberg: 4 lessons from robots about being human

TEDxBerkeley

Ken Goldberg: 4 lessons from robots about being human


The more that robots ingrain themselves into our everyday lives, the more we're forced to examine ourselves as people. At TEDxBerkeley, Ken Goldberg shares four very human lessons that he's learned from working with robots.

Reggie Watts: Beats that defy boxes

TED2012

Reggie Watts: Beats that defy boxes


Reggie Watts’ beats defy boxes. Unplug your logic board and watch as he blends poetry and crosses musical genres in this larger-than-life performance.

Shereen El-Feki: HIV -- how to fight an epidemic of bad laws

TEDxSummit

Shereen El-Feki: HIV -- how to fight an epidemic of bad laws


There is an epidemic of HIV, and with it an epidemic of bad laws -- laws that effectively criminalize being HIV positive. At the TEDxSummit in Doha, TED Fellow Shereen El-Feki gives a forceful argument that these laws, based in stigma, are actually helping the disease spread.

Philippe Petit: The journey across the high wire

TED2012

Philippe Petit: The journey across the high wire


Even a death-defying magician has to start somewhere. High-wire artist Philippe Petit takes you on an intimate journey from his first card trick at age 6 to his tightrope walk between the Twin Towers.

Hans Rosling: Religions and babies

TEDxSummit

Hans Rosling: Religions and babies


Hans Rosling had a question: Do some religions have a higher birth rate than others -- and how does this affect global population growth? Speaking at the TEDxSummit in Doha, Qatar, he graphs data over time and across religions. With his trademark humor and sharp insight, Hans reaches a surprising conclusion on world fertility rates.

Nathan Wolfe: What's left to explore?

TED2012

Nathan Wolfe: What's left to explore?


We've been to the moon, we've mapped the continents, we've even been to the deepest point in the ocean -- twice. What's left for the next generation to explore? Biologist and explorer Nathan Wolfe suggests this answer: Almost everything. And we can start, he says, with the world of the unseeably small.

Melissa Garren: The sea we've hardly seen

TEDxMonterey

Melissa Garren: The sea we've hardly seen


An average teaspoon of ocean water contains five million bacteria and fifty million viruses – and yet we are just starting to discover how these "invisible engineers" control our ocean's chemistry. At TEDxMonterey, Melissa Garren sheds light on marine microbes that provide half the oxygen we breathe, maintain underwater ecosystems, and demonstrate surprising hunting skills. (Apologies for the small audio glitches in this video.) (Filmed at TEDxMonterey.)

Michael McDaniel: Cheap, effective shelter for disaster relief

TEDxAustin

Michael McDaniel: Cheap, effective shelter for disaster relief


Michael McDaniel designed housing for disaster relief zones -- inexpensive, easy to transport, even beautiful – but found that no one was willing to build it. Persistent and obsessed, he decided to go it alone. At TEDxAustin, McDaniel show us his Exo Reaction Housing Solution and shares how he's dedicating his free time to working with suppliers and manufacturers to prepare for the next natural disaster. (Filmed at TEDxAustin.)

JR: One year of turning the world inside out

TED2012

JR: One year of turning the world inside out


Street artist JR made a wish in 2011: Join me in a worldwide photo project to show the world its true face. Now, a year after his TED Prize wish, he shows how giant posters of human faces, pasted in public, are connecting communities, making change, and turning the world inside out. You can join in at insideoutproject.net

Carl Schoonover: How to look inside the brain

TED2012

Carl Schoonover: How to look inside the brain


There have been remarkable advances in understanding the brain, but how do you actually study the neurons inside it? Using gorgeous imagery, neuroscientist and TED Fellow Carl Schoonover shows the tools that let us see inside our brains.

David Kelley: How to build your creative confidence

TED2012

David Kelley: How to build your creative confidence


Is your school or workplace divided into "creatives" versus practical people? Yet surely, David Kelley suggests, creativity is not the domain of only a chosen few. Telling stories from his legendary design career and his own life, he offers ways to build the confidence to create... (From The Design Studio session at TED2012, guest-curated by Chee Pearlman and David Rockwell.)

Jean-Baptiste Michel: The mathematics of history

TED2012

Jean-Baptiste Michel: The mathematics of history


What can mathematics say about history? According to TED Fellow Jean-Baptiste Michel, quite a lot. From changes to language to the deadliness of wars, he shows how digitized history is just starting to reveal deep underlying patterns.

Tali Sharot: The optimism bias

TED2012

Tali Sharot: The optimism bias


Are we born to be optimistic, rather than realistic? Tali Sharot shares new research that suggests our brains are wired to look on the bright side -- and how that can be both dangerous and beneficial.

José Bowen: Beethoven the businessman

TEDxSMU

José Bowen: Beethoven the businessman


The revolution that made music more marketable, more personal and easier to pirate began ... at the dawn of the nineteenth-century. At TEDxSMU, José Bowen outlines how new printing technology and an improved piano gave rise to the first music industry and influenced a generation of composers. (Filmed at TEDxSMU.)

Bart Knols: Cheese, dogs and a pill to kill mosquitoes and end malaria

TEDxMaastricht

Bart Knols: Cheese, dogs and a pill to kill mosquitoes and end malaria


We can use a mosquito's own instincts against her. At TEDxMaastricht speaker Bart Knols demos the imaginative solutions his team is developing to fight malaria -- including limburger cheese and a deadly pill. (Filmed at TEDxMaastricht.)

Renny Gleeson: 404, the story of a page not found

TED2012

Renny Gleeson: 404, the story of a page not found


Oops! Nobody wants to see the 404: Page Not Found. But as Renny Gleeson shows us, while he runs through a slideshow of creative and funny 404 pages, every error is really a chance to build a better relationship.

Joshua Foer: Feats of memory anyone can do

TED2012

Joshua Foer: Feats of memory anyone can do


There are people who can quickly memorize lists of thousands of numbers, the order of all the cards in a deck (or ten!), and much more. Science writer Joshua Foer describes the technique -- called the memory palace -- and shows off its most remarkable feature: anyone can learn how to use it, including him.

Karen Bass: Unseen footage, untamed nature

TED2012

Karen Bass: Unseen footage, untamed nature


At TED2012, filmmaker Karen Bass shares some of the astonishing nature footage she's shot for the BBC and National Geographic -- including brand-new, previously unseen footage of the tube-lipped nectar bat, who feeds in a rather unusual way …

JP Rangaswami: Information is food

TED@SXSWi

JP Rangaswami: Information is food


How do we consume data? At TED@SXSWi, technologist JP Rangaswami muses on our relationship to information, and offers a surprising and sharp insight: we treat it like food.

Michael Tilson Thomas: Music and emotion through time

TED2012

Michael Tilson Thomas: Music and emotion through time


In this epic overview, Michael Tilson Thomas traces the development of classical music through the development of written notation, the record, and the re-mix.

Rick Guidotti: From stigma to supermodel

TEDxPhoenix

Rick Guidotti: From stigma to supermodel


Rick Guidotti is a fashion photographer with a passion project: finding and sharing the unmistakable beauty of kids with albinism and other conditions that affect their physical appearance -- and the way society treats them. At TEDxPhoenix, he shares some of their stories and the empowering effects of a little glamour as he redefines their beauty in a flash. (Filmed at TEDxPhoenix.)

Tavi Gevinson: A teen just trying to figure it out

TEDxTeen

Tavi Gevinson: A teen just trying to figure it out


Fifteen-year-old Tavi Gevinson had a hard time finding strong female, teenage role models -- so she built a space where they could find each other. At TEDxTeen, she illustrates how the conversations on sites like Rookie, her wildly popular web magazine for and by teen girls, are putting a new, unapologetically uncertain and richly complex face on modern feminism.

Rory Sutherland: Perspective is everything

TEDxAthens

Rory Sutherland: Perspective is everything


The circumstances of our lives may matter less than how we see them, says Rory Sutherland. At TEDxAthens, he makes a compelling case for how reframing is the key to happiness. (Filmed at TEDxAthens.)

Gary Kovacs: Tracking our online trackers

TED2012

Gary Kovacs: Tracking our online trackers


As you surf the Web, information is being collected about you. Web tracking is not 100% evil -- personal data can make your browsing more efficient; cookies can help your favorite websites stay in business. But, says Gary Kovacs, it's your right to know what data is being collected about you. He unveils a Firefox add-on, Collusion, to do just that. (Update: Collusion is now called Lightbeam.)

Reuben Margolin: Sculpting waves in wood and time

TED2012

Reuben Margolin: Sculpting waves in wood and time


Reuben Margolin is a kinetic sculptor, crafting beautiful pieces that move in the pattern of raindrops falling and waves combining. Take nine minutes and be mesmerized by his meditative art -- inspired in equal parts by math and nature.

Amory Lovins: A 40-year plan for energy

TEDSalon NY2012

Amory Lovins: A 40-year plan for energy


In this intimate talk filmed at TED's offices, energy innovator Amory Lovins shows how to get the US off oil and coal by 2050, $5 trillion cheaper, with no Act of Congress, led by business for profit. The key is integrating all four energy-using sectors—and four kinds of innovation.

Liz Diller: A new museum wing ... in a giant bubble

TED2012

Liz Diller: A new museum wing ... in a giant bubble


How do you make a great public space inside a not-so-great building? Liz Diller shares the story of creating a welcoming, lighthearted (even, dare we say it, sexy) addition to the Hirshhorn Museum in Washington, DC. (From The Design Studio session at TED2012, guest-curated by Chee Pearlman and David Rockwell.)

Brenda Romero: Gaming for understanding

TEDxPhoenix

Brenda Romero: Gaming for understanding


It's never easy to get across the magnitude of complex tragedies -- so when Brenda Romero's daughter came home from school asking about slavery, she did what she does for a living -- she designed a game. She describes the surprising effectiveness of this game, and others, in helping the player really understand the story.