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Jonathan Haidt on the moral roots of liberals and conservatives

Dean Kamen previews a new prosthetic arm

Blaise Aguera y Arcas demos Photosynth

Hans Rosling's new insights on poverty

Theo Jansen creates new creatures

VS Ramachandran on your mind

Isabel Allende tells tales of passion

Gever Tulley 5 dangerous things you should let your kids do

J.J. Abrams' mystery box

David Gallo shows underwater astonishments

James Randi's fiery takedown of psychic fraud

Rick Warren on a life of purpose

Tony Robbins asks why we do what we do

Al Gore on averting climate crisis

Africa: The Next Chapter

Ken Robinson says schools kill creativity

Hans Rosling shows the best stats you've ever seen

Jeff Han demos his breakthrough touchscreen

Michael Shermer on strange beliefs

Woody Norris invents amazing things

Jennifer Lin improvs piano magic

Dan Gilbert asks, Why are we happy?

Malcolm Gladwell on spaghetti sauce

Susan Savage-Rumbaugh: The real-life culture of bonobos

Matthieu Ricard on the habits of happiness

Keith Barry does brain magic

Dan Gilbert on our mistaken expectations

Aubrey de Grey says we can avoid aging

Barry Schwartz on the paradox of choice