• nadia al-sakkaf: see yemen through my eyes
• why open a school? to close a prison
• nadine burke harris: how childhood trauma affects health across a lifetime
• what time is it on mars?
• naif al-mutawa: superheroes inspired by islam
• nalini nadkarni: life science in prison
• nancy etcoff: happiness and its surprises
• nancy frates: meet the mom who started the ice bucket challenge
• nancy kanwisher: a neural portrait of the human mind
• nancy lublin how data from a crisis text line is saving lives
• nancy lublin: texting that saves lives
• nandan nilekani's ideas for india's future
• naomi klein: addicted to risk
• naomi oreskes why we should trust scientists
• natalie jeremijenko: the art of the eco-mindshift
• macmaster + leahy play the fiddle
• natalie macmaster fiddles in reel time
• let's clean up the space junk orbiting earth
• how radio telescopes show us unseen galaxies
• natasha tsakos' multimedia theatrical adventure
• nathalie cabrol how mars might hold the secret to the origin of life
• nathalie miebach: art made of storms
• nathan myhrvold: could this laser zap malaria?
• nathan myhrvold cut your food in half
• nathan myhrvold on archeology, animal photography, bbq ... 
• nathan wolfe: what's left to explore?
• nathaniel kahn on "my architect"
• naturally 7 beatboxes a whole band
• navi radjou: creative problem-solving in the face of extreme limits
• negin farsad a highly scientific taxonomy of haters
• the future of money
• neil burgess: how your brain tells you where you are
• neil gershenfeld on fab labs
• neil harbisson: i listen to color
• neil macgregor: 2600 years of history in one object
• neil pasricha: the 3 a's of awesome
• neil turok makes his ted prize wish
• nellie mckay sings "clonie"
• nellie mckay sings "mother of pearl" and "if i had you"
• nellie mckay sings "the dog song"
• neri oxman design at the intersection of technology and biology
• newton aduaka tells the story of ezra
• ngozi okonjo-iweala on aid versus trade
• ngozi okonjo-iweala: want to help africa? do business here
• ngozi okonjo-iweala how africa can keep rising
• niall ferguson: the 6 killer apps of prosperity
• nic marks: the happy planet index
• nicholas christakis: how social networks predict epidemics
• nicholas christakis: the hidden influence of social networks
• nicholas negroponte a 30-year history of the future
• nicholas negroponte, in 1984, makes 5 predictions
• nicholas negroponte on one laptop per child, two years on
• nicholas negroponte on one laptop per child
• negroponte takes olpc to colombia
• nick bostrom on our biggest problems
• nick bostrom what happens when our computers get smarter than we are
• nick hanauer beware, fellow plutocrats, the pitchforks are coming
• nick sears demos the orb
• nick veasey: exposing the invisible
• nicolas perony puppies now that i've got your attention, complexity theory
• nicole paris and ed cage a beatboxing lesson from a father-daughter duo
• niels diffrient rethinks the way we sit down
• nigel marsh: how to make work-life balance work
• nikolai begg a tool to fix one of the most dangerous moments in surgery
• nilofer merchant: got a meeting? take a walk
• a secret weapon against zika and other mosquito-borne diseases
• nina jablonski breaks the illusion of skin color
• nina tandon caring for cells
• nina tandon: could tissue engineering mean personalized medicine?
• nirmalya kumar: india's invisible innovation
• nizar ibrahim how we unearthed the spinosaurus
• noah feldman says politics and religion are technologies
• noah wilson-rich: every city needs healthy honey bees
• noel bairey merz: the single biggest health threat women face
• nonny de la peña the future of news virtual reality
• nora york sings "what i want"
• noreena hertz: how to use experts—and when not to
• norman foster's green agenda
• norman lear an entertainment icon on living a life of meaning
• norman spack how i help transgender teens become who they want to be
• noy thrupkaew human trafficking is all around you. this is how it works