• quyen nguyen: color-coded surgery
  • r.a. mashelkar: breakthrough designs for ultra-low-cost products
  • r. luke dubois insightful human portraits made from data
  • rachel armstrong: architecture that repairs itself?
  • rachel botsman: the case for collaborative consumption
  • rachel botsman: the currency of the new economy is trust
  • we've stopped trusting institutions and started trusting strangers
  • rachel pike: the science behind a climate headline
  • rachel sussman: the world's oldest living things
  • raffaello d'andrea: the astounding athletic power of quadcopters
  • raffaello d'andrea meet the dazzling flying machines of the future
  • raghava kk: my 5 lives as an artist
  • raghava kk: shake up your story
  • raghava kk: what's your 200-year plan?
  • rainer strack: the workforce crisis of 2030—and how to start solving it now
  • ideas worth dating
  • no one should die because they live too far from a doctor
  • rajesh rao computing a rosetta stone for the indus script
  • rajiv maheswaran the math behind basketball's wildest moves
  • ralph langner cracking stuxnet a 21st century cyberweapon
  • ramanan laxminarayan: the coming crisis in antibiotics
  • ramesh raskar: imaging at a trillion frames per second
  • ramona pierson: an unexpected place of healing
  • ramsey musallam: 3 rules to spark learning
  • rana el kaliouby this app knows how you feel—from the look on your face
  • randall munroe comics that ask what if
  • raul midon plays "tembererana"
  • raul midon plays "peace on earth"
  • ravin agrawal: 10 young indian artists to watch
  • ray anderson: the business logic of sustainability
  • ray kurzweil: a university for the coming singularity
  • ray kurzweil get ready for hybrid thinking
  • ray kurzweil: the accelerating power of technology
  • ray zahab treks to the south pole
  • raymond wang how germs travel on planes—and how we can stop them
  • read montague: what we're learning from 5,000 brains
  • could a drug prevent depression and ptsd?
  • rebecca mackinnon: let's take back the internet!
  • we can fight terror without sacrificing our rights
  • rebecca onie: what if our healthcare system kept us healthy?
  • rebecca saxe: how we read each other's minds
  • reed kroloff on modern and romantic architecture
  • reggie watts disorients you in the most entertaining way
  • regina dugan: from mach-20 glider to humming bird drone
  • regina hartley why the best hire might not have the perfect resume
  • larry burns on the future of cars
  • renata salecl our unhealthy obsession with choice
  • renny gleeson: 404, the story of a page not found
  • reshma saujani teach girls bravery, not perfection
  • reuben margolin: sculpting waves in wood and time
  • songs that bring history to life
  • ric elias
  • ricardo semler: how to run a company with (almost) no rules
  • riccardo sabatini how to read the genome and build a human being
  • rich benjamin my road trip through the whitest towns in america
  • richard baraniuk on open-source learning
  • richard branson: life at 30,000 feet
  • how i built a jet suit
  • richard dawkins: militant atheism
  • richard dawkins: why the universe seems so strange
  • richard ledgett the nsa responds to edward snowden's ted talk
  • richard preston on the giant trees
  • richard pyle dives the reef's twilight zone
  • richard resnick: welcome to the genomic revolution
  • richard sears: planning for the end of oil
  • richard seymour: how beauty feels
  • richard st. john: "success is a continuous journey"
  • richard st. john's 8 secrets of success
  • richard turere: my invention that made peace with lions
  • richard weller: could the sun be good for your heart?
  • richard wilkinson: how economic inequality harms societies
  • rick smolan tells the story of a girl
  • rick warren: a life of purpose
  • rishi manchanda what makes us get sick look upstream.
  • rita pierson: every kid needs a champion
  • rives: if i controlled the internet ... 
  • rives: the 4 a.m. mystery
  • rives: reinventing the encyclopedia game
  • rives remixes ted2006
  • rives: a story of mixed emoticons
  • rives the museum of four in the morning
  • rob dunbar: discovering ancient climates in oceans and ice
  • rob forbes on ways of seeing
  • rob harmon: how the market can keep streams flowing
  • rob hopkins: transition to a world without oil
  • rob knight: how our microbes make us who we are
  • rob legato: the art of creating awe
  • rob reid: the $8 billion ipod
  • how to have better political conversations
  • robert ballard on exploring the oceans
  • robert fischell on medical inventing
  • robert full: learning from the gecko's tail
  • robert full on animal movement
  • robert full: engineering and evolution
  • robert full the secrets of nature's grossest creatures, channeled into robots
  • robert gordon: the death of innovation, the end of growth
  • robert gupta: between music and medicine
  • robert gupta: music is medicine, music is sanity
  • robert hammond building a park in the sky
  • robert lang: the math and magic of origami
  • robert muggah: how to protect fast-growing cities from failing
  • robert neuwirth on our "shadow cities"
  • robert neuwirth: the power of the informal economy
  • robert palmer the panama papers exposed a huge global problem. what's next
  • robert sapolsky: the biology of our best and worst selves
  • robert swan: let's save the last pristine continent
  • robert thurman: expanding your circle of compassion
  • robert waldinger what makes a good life lessons from the longest study on happiness
  • robert wright: the logic of non-zero-sum progress
  • robert wright: the evolution of compassion
  • roberto d angelo francesca fedeli in our baby s illness a life lesson
  • robin chase: excuse me, may i rent your car?
  • robin chase on zipcar and her next big idea
  • robin ince: science versus wonder?
  • robin morgan 4 powerful poems about parkinson s and growing older
  • robin murphy these robots come to the rescue after a disaster
  • robin nagle what i discovered in new york city trash
  • robyn stein deluca: the good news about pms
  • rodney brooks says robots will invade our lives
  • rodney brooks why we will rely on robots
  • rodney mullen: pop an ollie and innovate!
  • rodrigo bijou governments don't understand cyber warfare. we need hackers
  • a.j. jacobs how healthy living nearly killed me
  • math is the hidden secret to understanding the world
  • roger ebert remaking my voice
  • a.j. jacobs how healthy living nearly killed me
  • rogier van der heide: why light needs darkness
  • roman mars why city flags may be the worst-designed thing you've never noticed
  • romina libster: the power of herd immunity
  • romulus whitaker: the real danger lurking in the water
  • ron eglash: the fractals at the heart of african designs
  • ron finley: a guerilla gardener in south central la
  • ron gutman the hidden power of smiling
  • ron mccallum how technology allowed me to read
  • rory bremner's one-man world summit
  • rory stewart: why democracy matters
  • rory stewart: time to end the war in afghanistan
  • rory sutherland: life lessons from an ad man
  • rory sutherland: perspective is everything
  • rory sutherland: sweat the small stuff
  • a.j. jacobs how healthy living nearly killed me
  • rose george: let's talk crap. seriously.
  • rose goslinga crop insurance, an idea worth seeding
  • roselinde torres what it takes to be a great leader
  • rosie king: how autism freed me to be myself
  • ross lovegrove shares organic designs
  • roxane gay confessions of a bad feminist
  • roy gould and curtis wong preview the worldwide telescope
  • roz savage: why i'm rowing across the pacific
  • ruby wax: what's so funny about mental illness?
  • let's talk parenting taboos: rufus griscom + alisa volkman
  • rupal patel synthetic voices, as unique as fingerprints
  • russ altman what really happens when you mix medications
  • russell foster why do we sleep
  • poverty isn't a lack of character; it's a lack of cash
  • ruth chang how to make hard choices
  • how an old loop of railroads is changing the face of a city
  • a.j. jacobs how healthy living nearly killed me
  • ryan holladay to hear this music you have to be there. literally
  • ryan lobo: photographing the hidden story
  • ryan merkley: online video—annotated, remixed and popped