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Loretta Napoleoni: The intricate economics of terrorism

Loretta Napoleoni details her rare opportunity to talk to the secretive Italian Red Brigades -- an experience that sparked a lifelong interest in terrorism. She gives a behind-the-scenes look at its complex economics, revealing a surprising connection between money laundering and the US Patriot Act.
( 2011-11-14 , Grade: 7.5 )

Jill Bolte Taylor: My stroke of insight

Jill Bolte Taylor got a research opportunity few brain scientists would wish for: she had a massive stroke, and watched as her brain functions -- motion, speech, self-awareness –- shut down one by one. An astonishing story.
( 2011-11-14 , Grade: 6.6 )

J.J. Abrams: The mystery box

J.J. Abrams traces his love for the unseen mystery –- a passion that’s evident in his films and TV shows, including Cloverfield, Lost and Alias -- back to its magical beginnings.
( 2011-11-14 , Grade: 3.8 )

Isabel Allende: Tales of passion

Author and activist Isabel Allende discusses women, creativity, the definition of feminism -- and, of course, passion -- in this talk.
( 2011-11-14 , Grade: 6.5 )

Yossi Vardi: We're worried about local warming ... in your lap

Investor and prankster Yossi Vardi delivers a careful lecture on the dangers of blogging. Specifically, for men.
( 2011-11-14 , Grade: 6.2 )

Gever Tulley: 5 dangerous things you should let your kids do

Gever Tulley, founder of the Tinkering School, spells out 5 dangerous things you should let your kids do. From TED University 2007.
( 2011-11-14 , Grade: 6.8 )

Lakshmi Pratury: The lost art of letter-writing

Lakshmi Pratury remembers the lost art of letter-writing and shares a series of notes her father wrote to her before he died. Her short but heartfelt talk may inspire you to set pen to paper, too.
( 2011-11-14 , Grade: 7.0 )

Daniel Goleman: Why aren't we more compassionate?

Daniel Goleman, author of Emotional Intelligence, asks why we aren't more compassionate more of the time.
( 2011-11-14 , Grade: 8.3 )

Arthur Benjamin: A performance of "Mathemagic"

In a lively show, mathemagician Arthur Benjamin races a team of calculators to figure out 3-digit squares, solves another massive mental equation and guesses a few birthdays. How does he do it? He’ll tell you.
( 2011-11-14 , Grade: 2.7 )

Ron Eglash: The fractals at the heart of African designs

"I am a mathematician, and I would like to stand on your roof." That is how Ron Eglash greeted many African families he met while researching the fractal patterns he’d noticed in villages across the continent.
( 2011-11-14 , Grade: 7.8 )

Robert Full: The sticky wonder of gecko feet

Biologist Robert Full shares slo-mo video of some captivating critters. Take a closer look at the spiny legs that allow cockroaches to scuttle across mesh and the nanobristle-packed feet that let geckos to run straight up walls.
( 2011-11-14 , Grade: 5.7 )

Thulasiraj Ravilla: How low-cost eye care can be world-class

India's revolutionary Aravind Eye Care System has given sight to millions. Thulasiraj Ravilla looks at the ingenious approach that drives its treatment costs down and quality up, and why its methods should trigger a re-think of all human services.
( 2011-11-13 , Grade: 8.6 )

Sunitha Krishnan: The fight against sex slavery

Sunitha Krishnan has dedicated her life to rescuing women and children from sex slavery, a multimilion-dollar global market. In this courageous talk, she tells three powerful stories, as well as her own, and calls for a more humane approach to helping these young victims rebuild their lives.
( 2011-11-13 , Grade: 5.5 )

Andrea Ghez: The hunt for a supermassive black hole

With new data from the Keck telescopes, Andrea Ghez shows how state-of-the-art adaptive optics are helping astronomers understand our universe's most mysterious objects: black holes. She shares evidence that a supermassive black hole may be lurking at the center of the Milky Way.
( 2011-11-13 , Grade: 7.2 )

Murray Gell-Mann: Beauty, truth and ... physics?

Armed with a sense of humor and laypeople's terms, Nobel winner Murray Gell-Mann drops some knowledge on TEDsters about particle physics, asking questions like, Are elegant equations more likely to be right than inelegant ones?
( 2011-11-12 , Grade: 7.0 )

Juan Enriquez: Using biology to rethink the energy challenge

Juan Enriquez challenges our definition of bioenergy. Oil, coal, gas and other hydrocarbons are not chemical but biological products, based on plant matter -- and thus, growable. Our whole approach to fuel, he argues, needs to change.
( 2011-11-12 , Grade: 6.9 )

Gordon Brown: Global ethic vs. national interest

Can the interests of an individual nation be reconciled with humanity's greater good? Can a patriotic, nationally elected politician really give people in other countries equal consideration? Following his TEDTalk calling for a global ethic, UK Prime Minister Gordon Brown fields questions from TED Curator Chris Anderson.
( 2011-11-12 , Grade: 9.3 )

Rob Hopkins: Transition to a world without oil

Rob Hopkins reminds us that the oil our world depends on is steadily running out. He proposes a unique solution to this problem -- the Transition response, where we prepare ourselves for life without oil and sacrifice our luxuries to build systems and communities that are completely independent of fossil fuels.
( 2011-11-12 , Grade: 9.0 )

Hans Rosling: Asia's rise -- how and when

Hans Rosling was a young guest student in India when he first realized that Asia had all the capacities to reclaim its place as the world's dominant economic force. At TEDIndia, he graphs global economic growth since 1858 and predicts the exact date that India and China will outstrip the US.
( 2011-11-12 , Grade: 5.7 )

Tom Wujec: Learn to use the 13th-century astrolabe

Rather than demo another new technology, Tom Wujec reaches back to one of our earliest but most ingenious devices -- the astrolabe. With thousands of uses, from telling time to mapping the night sky, this old tech reminds us that the ancient can be as brilliant as the brand-new.
( 2011-11-12 , Grade: 5.4 )