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The Latest in Ideas1) What a living whale is worth -- and why the economy should protect nature ----- Ralph Chami; 2) An Indigenous perspective on humanity's survival on Earth ----- Jupta Itoewaki; 3) The kingdom hidden in Brazil ----- Marc Adam Hertzman and Flavio dos Santos Gomes; 4) Why people love watching sports ----- Kate Fagan; 5) What does the world's largest machine do? ----- Henry Richardson.![TED]()

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Now Playing16minWhy you will fail to have a great career | Larry Smith
Now Playing24minWhy we love, why we cheat | Helen Fisher
Now Playing11minHow cities are detoxing transportation | Monica Araya
Now Playing15minHow to make hard choices | Ruth Chang
Now Playing8minThe antidote to apathy | Dave Meslin
Now Playing13minWhat makes a good life? Lessons from the longest study on happiness | Robert Waldinger
Now Playing16minI grew up in the Westboro Baptist Church. Here's why I left | Megan Phelps-Roper
Now Playing12minWhy can't we talk about periods? | Jen Gunter
Now Playing24minThe new era of positive psychology | Martin Seligman
Now Playing20minThe world needs all kinds of minds | Temple Grandin
Now Playing18minChoice, happiness and spaghetti sauce | Malcolm Gladwell
Now Playing14minThe most mysterious star in the universe | Tabetha Boyajian
Now Playing11minHow to make work-life balance work | Nigel Marsh
Now Playing14minHow the mysterious dark net is going mainstream | Jamie Bartlett
Now Playing16minSay your truths and seek them in others | Elizabeth Lesser
Now Playing19minHow bacteria "talk" | Bonnie Bassler
Now Playing24min3 clues to understanding your brain | VS Ramachandran
Now Playing17minYour brain hallucinates your conscious reality | Anil Seth
Now Playing18minThe mathematics of love | Hannah Fry
Now Playing13minThe happy secret to better work | Shawn Achor
Now Playing13minMy escape from North Korea | Hyeonseo Lee
Now Playing17minWhen ideas have sex | Matt Ridley
Now Playing11minWhat if you could help decide how the government spends public funds? | Shari Davis
Now Playing21minFeats of memory anyone can do | Joshua Foer
Now Playing20minThe secret to desire in a long-term relationship | Esther Perel
Business & Leadership
Now Playing12minHow we can curb climate change by spending two percent more on everything | Jens Burchardt
Now Playing15minInside the mind of a master procrastinator | Tim Urban
Now Playing16minHow to build (and rebuild) trust | Frances Frei
Now Playing14minThe art of asking | Amanda Palmer
Now Playing22minTeach every child about food | Jamie Oliver
Now Playing16minWhy you will fail to have a great career | Larry Smith
Now Playing16minWhy work doesn't happen at work | Jason Fried
Now Playing18minThe difference between winning and succeeding | John Wooden
Now Playing41minThe future we're building -- and boring | Elon Musk
Now Playing13minWhy some of us don't have one true calling | Emilie Wapnick
Now Playing8minHow to be a good ancestor | Roman Krznaric
Now Playing15minWhat will future jobs look like? | Andrew McAfee
Now Playing19minThe way we think about charity is dead wrong | Dan Pallotta
Now Playing11minThe power of believing that you can improve | Carol Dweck
Now Playing16minHow to speak up for yourself | Adam Galinsky
Now Playing10minClimate justice can't happen without racial justice | David Lammy
Now Playing16minFacebook's role in Brexit -- and the threat to democracy | Carole Cadwalladr
Now Playing11minWhat if you could help decide how the government spends public funds? | Shari Davis
Now Playing11minHow cities are detoxing transportation | Monica Araya
Now Playing15minHow to disagree productively and find common ground | Julia Dhar
Now Playing19minThe puzzle of motivation | Dan Pink
Now Playing5min3 things I learned while my plane crashed | Ric Elias
Now Playing20minThe paradox of choice | Barry Schwartz
Now Playing8minThis decade calls for Earthshots to repair our planet | Prince William
Now Playing14minHow the mysterious dark net is going mainstream | Jamie Bartlett
Now Playing13minThe happy secret to better work | Shawn Achor
Now Playing25minWhy giving away our wealth has been the most satisfying thing we've done | Bill and Melinda Gates
Now Playing14minWhy you should define your fears instead of your goals | Tim Ferriss
Now Playing19minThe power of introverts | Susan Cain
Now Playing10minAll it takes is 10 mindful minutes | Andy Puddicombe
Now Playing20minYour elusive creative genius | Elizabeth Gilbert
Now Playing16minHow to make radical climate action the new normal | Al Gore
Now Playing21minWhat makes us feel good about our work? | Dan Ariely
Now Playing18minA powerful way to unleash your natural creativity | Tim Harford
Now Playing14minAre you a giver or a taker? | Adam Grant
Now Playing7minThe single biggest reason why start-ups succeed | Bill Gross
Now Playing15minWhy we have too few women leaders | Sheryl Sandberg
Now Playing8minTo save the climate, we have to reimagine capitalism | Rebecca Henderson
Now Playing16minWhy winning doesn't always equal success | Valorie Kondos Field
Now Playing13min3 questions to ask yourself about everything you do | Stacey Abrams
Now Playing21minMosquitos, malaria and education | Bill Gates
Now Playing7minGrit: The power of passion and perseverance | Angela Lee Duckworth
Now Playing17minWhen ideas have sex | Matt Ridley
Now Playing8min10 years to transform the future of humanity -- or destabilize the planet | Johan Rockström
Now Playing12minHow to gain control of your free time | Laura Vanderkam
Now Playing19minHow great leaders inspire action | Simon Sinek
Now Playing15minPoverty isn't a lack of character; it's a lack of cash | Rutger Bregman
Now Playing14minThe rigged test of leadership | Sophie Williams
Now Playing17minHow to get your ideas to spread | Seth Godin
Now Playing4min8 secrets of success | Richard St. John
Science & Technology
Now Playing17minOptical illusions show how we see | Beau Lotto
Now Playing18minWhere good ideas come from | Steven Johnson
Now Playing28minInnovating to zero! | Bill Gates
Now Playing16minThe biology of our best and worst selves | Robert Sapolsky
Now Playing11minAn ultra-low-cost college degree | Shai Reshef
Now Playing22minThe mind behind Linux | Linus Torvalds
Now Playing24minThe new era of positive psychology | Martin Seligman
Now Playing20minSleep is your superpower | Matt Walker
Now Playing19minHow to spot a liar | Pamela Meyer
Now Playing24minHow humans and animals can live together | Jane Goodall
Now Playing12minYou can grow new brain cells. Here's how | Sandrine Thuret
Now Playing19minHow to tame your wandering mind | Amishi Jha
Now Playing18minHow reliable is your memory? | Elizabeth Loftus
Now Playing22minWhy do we sleep? | Russell Foster
Now Playing20minThe game that can give you 10 extra years of life | Jane McGonigal
Now Playing14minHow we can turn the cold of outer space into a renewable resource | Aaswath Raman
Now Playing6minHow to control someone else's arm with your brain | Greg Gage
Now Playing7minThe single biggest reason why start-ups succeed | Bill Gross
Now Playing9minHow we found the giant squid | Edith Widder
Now Playing15minWhy we have too few women leaders | Sheryl Sandberg
Now Playing12minThe global movement to restore nature's biodiversity | Thomas Crowther
Now Playing6minUnderwater astonishments | David Gallo
Now Playing16minThe incredible inventions of intuitive AI | Maurice Conti
Now Playing7minA robot that flies like a bird | Markus Fischer
Now Playing12minMeet the dazzling flying machines of the future | Raffaello D'Andrea
Now Playing21minFeats of memory anyone can do | Joshua Foer
Now Playing17minThe nightmare videos of children's YouTube -- and what's wrong with the internet today | James Bridle
Now Playing21minMosquitos, malaria and education | Bill Gates
Now Playing8min10 years to transform the future of humanity -- or destabilize the planet | Johan Rockström
Now Playing17minWhen ideas have sex | Matt Ridley
Now Playing23minThe price of shame | Monica Lewinsky
Now Playing19minChemical scum that dream of distant quasars | David Deutsch
Now Playing14minHow technology has changed what it's like to be deaf | Rebecca Knill
Now Playing9minBeware online "filter bubbles" | Eli Pariser
Now Playing15minAre athletes really getting faster, better, stronger? | David Epstein
Now Playing9minMeet the SixthSense interaction | Pattie Maes + Pranav Mistry
Now Playing11minQuestioning the universe | Stephen Hawking
Now Playing9minMy creations, a new form of life | Theo Jansen
Now Playing22minIs our universe the only universe? | Brian Greene
Now Playing12minHow to build your creative confidence | David Kelley
Now Playing10min5 dangerous things you should let your kids do | Gever Tulley
Now Playing16minHunting for dinosaurs showed me our place in the universe | Kenneth Lacovara
Now Playing11minHow cities are detoxing transportation | Monica Araya
Now Playing17minThe astounding athletic power of quadcopters | Raffaello D'Andrea
Now Playing19minThe puzzle of motivation | Dan Pink
Now Playing14minWhy people believe weird things | Michael Shermer
Now Playing19minMy stroke of insight | Jill Bolte Taylor
Now Playing14minThe most mysterious star in the universe | Tabetha Boyajian
Now Playing15minHow language shapes the way we think | Lera Boroditsky
Now Playing8minThis decade calls for Earthshots to repair our planet | Prince William
Culture
Now Playing19minChemical scum that dream of distant quasars | David Deutsch
Now Playing9minBeware online "filter bubbles" | Eli Pariser
Now Playing16minThe new political story that could change everything | George Monbiot
Now Playing16minWhy domestic violence victims don't leave | Leslie Morgan Steiner
Now Playing4min8 secrets of success | Richard St. John
Now Playing17minHow to get your ideas to spread | Seth Godin
Now Playing17minThe gift and power of emotional courage | Susan David
Now Playing20minHow to escape education's death valley | Sir Ken Robinson
Now Playing15minWant to be happy? Be grateful | David Steindl-Rast
Now Playing14minThe Black history of twerking -- and how it taught me self-love | Lizzo
Now Playing19minThe danger of a single story | Chimamanda Ngozi Adichie
Now Playing21minFeats of memory anyone can do | Joshua Foer
Now Playing17minThe nightmare videos of children's YouTube -- and what's wrong with the internet today | James Bridle
Now Playing10minThe magic washing machine | Hans Rosling
Now Playing10minLooks aren't everything. Believe me, I'm a model. | Cameron Russell
Now Playing17minA kinder, gentler philosophy of success | Alain de Botton
Now Playing21minHow the worst moments in our lives make us who we are | Andrew Solomon
Now Playing19minHow to spot a liar | Pamela Meyer
Now Playing18minChoice, happiness and spaghetti sauce | Malcolm Gladwell
Now Playing17minWhat it's like to be Muslim in America | Dalia Mogahed
Now Playing19minThe moral roots of liberals and conservatives | Jonathan Haidt
Now Playing30minDepression, the secret we share | Andrew Solomon
Now Playing24minWe need to talk about an injustice | Bryan Stevenson
Now Playing5minHow to succeed? Get more sleep | Arianna Huffington
Now Playing19minFlow, the secret to happiness | Mihaly Csikszentmihalyi
Now Playing19minMy year of saying yes to everything | Shonda Rhimes
Now Playing11minHow to make work-life balance work | Nigel Marsh
Now Playing22minThe revolutionary power of diverse thought | Elif Shafak
Now Playing16minNever, ever give up | Diana Nyad
Now Playing34minWhy we make bad decisions | Dan Gilbert
Now Playing6minLess stuff, more happiness | Graham Hill
Now Playing21minThe power of vulnerability | Brené Brown
Now Playing18minHomeopathy, quackery and fraud | James Randi
Now Playing22minRethinking infidelity ... a talk for anyone who has ever loved | Esther Perel
Now Playing7minHow books can open your mind | Lisa Bu
Now Playing18minThe difference between winning and succeeding | John Wooden
Now Playing15minDon't call people out -- call them in | Loretta J. Ross
Now Playing21minThe habits of happiness | Matthieu Ricard
Now Playing21minThe surprising science of happiness | Dan Gilbert
Now Playing14minHow craving attention makes you less creative | Joseph Gordon-Levitt
Now Playing24minScience can answer moral questions | Sam Harris
Now Playing10minNature. Beauty. Gratitude. | Louie Schwartzberg
Now Playing19minThe way we think about charity is dead wrong | Dan Pallotta
Now Playing15minHow we need to remake the internet | Jaron Lanier
Now Playing21minListening to shame | Brené Brown
Now Playing24minWhy we love, why we cheat | Helen Fisher
Now Playing13minMy escape from North Korea | Hyeonseo Lee
Now Playing21minThe riddle of experience vs. memory | Daniel Kahneman
Now Playing15minThe bridge between suicide and life | Kevin Briggs
Now Playing16minWhy work doesn't happen at work | Jason Fried
Environment
Now Playing19minChemical scum that dream of distant quasars | David Deutsch
Now Playing12minThe disarming case to act right now on climate change | Greta Thunberg
Now Playing8min10 years to transform the future of humanity -- or destabilize the planet | Johan Rockström
Now Playing12minThe global movement to restore nature's biodiversity | Thomas Crowther
Now Playing8minTo save the climate, we have to reimagine capitalism | Rebecca Henderson
Now Playing24minHow humans and animals can live together | Jane Goodall
Now Playing12minYou can grow new brain cells. Here's how | Sandrine Thuret
Now Playing19minWhat hallucination reveals about our minds | Oliver Sacks
Now Playing5minElectronic pills that could transform how we treat disease | Khalil Ramadi
Now Playing6minHow to control someone else's arm with your brain | Greg Gage
Now Playing22minWhy do we sleep? | Russell Foster
Now Playing8minHidden miracles of the natural world | Louie Schwartzberg
Now Playing14minHow we can turn the cold of outer space into a renewable resource | Aaswath Raman
Now Playing16minThe biology of our best and worst selves | Robert Sapolsky
Now Playing16minA healthy economy should be designed to thrive, not grow | Kate Raworth
Now Playing20minSleep is your superpower | Matt Walker
Now Playing41minThe future we're building -- and boring | Elon Musk
Now Playing10minNature. Beauty. Gratitude. | Louie Schwartzberg
Now Playing19minHow trees talk to each other | Suzanne Simard
Now Playing8minHow to be a good ancestor | Roman Krznaric
Now Playing14minWhy lakes and rivers should have the same rights as humans | Kelsey Leonard
Now Playing18minYour kids might live on Mars. Here's how they'll survive | Stephen Petranek
Now Playing14minThe story of 'Oumuamua, the first visitor from another star system | Karen J. Meech
Now Playing12minHow we can curb climate change by spending two percent more on everything | Jens Burchardt
Now Playing12minTracking the whole world's carbon emissions -- with satellites and AI | Gavin McCormick
Now Playing12minHow I climbed a 3,000-foot vertical cliff -- without ropes | Alex Honnold
Now Playing12minWhy can't we talk about periods? | Jen Gunter
Now Playing19minThis country isn't just carbon neutral -- it's carbon negative | Tshering Tobgay
Now Playing14minThe most mysterious star in the universe | Tabetha Boyajian
Now Playing8minThis decade calls for Earthshots to repair our planet | Prince William
Now Playing16minHow to make radical climate action the new normal | Al Gore
Now Playing19minHow bacteria "talk" | Bonnie Bassler
Now Playing16minHunting for dinosaurs showed me our place in the universe | Kenneth Lacovara
Now Playing11minHow cities are detoxing transportation | Monica Araya
Now Playing10minClimate justice can't happen without racial justice | David Lammy
Now Playing19minMy stroke of insight | Jill Bolte Taylor
Health
Now Playing14minWhat you can do to prevent Alzheimer's | Lisa Genova
Now Playing12minWhy can't we talk about periods? | Jen Gunter
Now Playing22minTeach every child about food | Jamie Oliver
Now Playing13minHow to stay calm when you know you'll be stressed | Daniel Levitin
Now Playing13minWhy dieting doesn't usually work | Sandra Aamodt
Now Playing20minWhat really matters at the end of life | BJ Miller
Now Playing18minHomeopathy, quackery and fraud | James Randi
Now Playing16minSay your truths and seek them in others | Elizabeth Lesser
Now Playing13minWhat makes a good life? Lessons from the longest study on happiness | Robert Waldinger
Now Playing10minAll it takes is 10 mindful minutes | Andy Puddicombe
Now Playing19minHow bacteria "talk" | Bonnie Bassler
Now Playing13minThe happy secret to better work | Shawn Achor
Now Playing20minHow not to be ignorant about the world | Hans and Ola Rosling
Now Playing15minThe voices in my head | Eleanor Longden
Now Playing21minMosquitos, malaria and education | Bill Gates
Now Playing20minSleep is your superpower | Matt Walker
Now Playing20minThe game that can give you 10 extra years of life | Jane McGonigal
Now Playing22minWhy do we sleep? | Russell Foster
Now Playing18minWhy we all need to practice emotional first aid | Guy Winch
Now Playing12minYou can grow new brain cells. Here's how | Sandrine Thuret
Now Playing5minElectronic pills that could transform how we treat disease | Khalil Ramadi
Now Playing15minHow to make stress your friend | Kelly McGonigal
Love & Happiness
Now Playing10minAll it takes is 10 mindful minutes | Andy Puddicombe
Now Playing13minHow to fix a broken heart | Guy Winch
Now Playing16minThe brain in love | Helen Fisher
Now Playing13minThe happy secret to better work | Shawn Achor
Now Playing13minWhat makes a good life? Lessons from the longest study on happiness | Robert Waldinger
Now Playing16minSay your truths and seek them in others | Elizabeth Lesser
Now Playing20minThe paradox of choice | Barry Schwartz
Now Playing16minHow to speak up for yourself | Adam Galinsky
Now Playing22minRethinking infidelity ... a talk for anyone who has ever loved | Esther Perel
Now Playing21minThe surprising science of happiness | Dan Gilbert
Now Playing21minThe habits of happiness | Matthieu Ricard
Now Playing19minThis country isn't just carbon neutral -- it's carbon negative | Tshering Tobgay
Now Playing16minWhy you will fail to have a great career | Larry Smith
Now Playing20minA love letter to realism in a time of grief | Mark Pollock and Simone George
Now Playing20minThe secret to desire in a long-term relationship | Esther Perel
Now Playing24minWhy we love, why we cheat | Helen Fisher
Now Playing21minThe riddle of experience vs. memory | Daniel Kahneman
Now Playing15minHow to raise successful kids -- without over-parenting | Julie Lythcott-Haims
Now Playing18minThe mathematics of love | Hannah Fry
Now Playing20minThe game that can give you 10 extra years of life | Jane McGonigal
Now Playing18minTales of passion | Isabel Allende
Now Playing24minThe new era of positive psychology | Martin Seligman
Now Playing6minLess stuff, more happiness | Graham Hill
Now Playing34minWhy we make bad decisions | Dan Gilbert
Now Playing13minThe difference between healthy and unhealthy love | Katie Hood
Now Playing19minFlow, the secret to happiness | Mihaly Csikszentmihalyi
Now Playing16minWhy domestic violence victims don't leave | Leslie Morgan Steiner
Now Playing17minThe gift and power of emotional courage | Susan David
Now Playing4min8 secrets of success | Richard St. John
Now Playing21minThis could be why you're depressed or anxious | Johann Hari
Now Playing12minHow to gain control of your free time | Laura Vanderkam
Now Playing15minWant to be happy? Be grateful | David Steindl-Rast
Now Playing12minHow compassion could save your strained relationships | Betty Hart
Now Playing16min12 truths I learned from life and writing | Anne Lamott
Now Playing15minWe don't "move on" from grief. We move forward with it | Nora McInerny
Entertainment
Now Playing20minYour elusive creative genius | Elizabeth Gilbert
Now Playing9minMy creations, a new form of life | Theo Jansen
Now Playing10min5 dangerous things you should let your kids do | Gever Tulley
Now Playing14minWhy people believe weird things | Michael Shermer
Now Playing17minHow boredom can lead to your most brilliant ideas | Manoush Zomorodi
Now Playing7minHow books can open your mind | Lisa Bu
Now Playing15minInside the mind of a master procrastinator | Tim Urban
Now Playing14minThe art of asking | Amanda Palmer
Now Playing18minTales of passion | Isabel Allende
Now Playing20minThe game that can give you 10 extra years of life | Jane McGonigal
Now Playing5minHow to succeed? Get more sleep | Arianna Huffington
Now Playing34minWhy we make bad decisions | Dan Gilbert
Now Playing19minIf I should have a daughter ... | Sarah Kay
Now Playing4min8 secrets of success | Richard St. John
Now Playing15minI got 99 problems ... palsy is just one | Maysoon Zayid
Now Playing14minThe Black history of twerking -- and how it taught me self-love | Lizzo
Social Change
Now Playing16minWhy winning doesn't always equal success | Valorie Kondos Field
Now Playing14minThe Black history of twerking -- and how it taught me self-love | Lizzo
Now Playing17minThe nightmare videos of children's YouTube -- and what's wrong with the internet today | James Bridle
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Now Playing17minHow to deconstruct racism, one headline at a time | Baratunde Thurston
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Now Playing9minThe profound power of an authentic apology | Eve Ensler
Now Playing13min3 questions to ask yourself about everything you do | Stacey Abrams
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Now Playing14minHow technology has changed what it's like to be deaf | Rebecca Knill
Now Playing22minThe revolutionary power of diverse thought | Elif Shafak
Now Playing21minThe power of vulnerability | Brené Brown
Now Playing16minA healthy economy should be designed to thrive, not grow | Kate Raworth
Now Playing20minThe game that can give you 10 extra years of life | Jane McGonigal
Now Playing52minThe difference between being "not racist" and antiracist | Ibram X. Kendi
Now Playing12minWhy can't we talk about periods? | Jen Gunter
Now Playing13minTeach girls bravery, not perfection | Reshma Saujani
Now Playing16minI grew up in the Westboro Baptist Church. Here's why I left | Megan Phelps-Roper
Now Playing11minA personal plea for humanity at the US-Mexico border | Juan Enriquez
Now Playing16minHow to build (and rebuild) trust | Frances Frei
Now Playing14minWhy lakes and rivers should have the same rights as humans | Kelsey Leonard
Now Playing15minWhat if we ended the injustice of bail? | Robin Steinberg
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Now Playing11minWant a more just world? Be an unlikely ally | Nita Mosby Tyler
Now Playing8minHow to be a good ancestor | Roman Krznaric
Now Playing15minHow we need to remake the internet | Jaron Lanier
Now Playing15minHow racial bias works -- and how to disrupt it | Jennifer L. Eberhardt
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Now Playing20minOur story of rape and reconciliation | Thordis Elva and Tom Stranger
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Now Playing19minThe puzzle of motivation | Dan Pink
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Full Catalog
Now Playing34minWhy we make bad decisions | Dan Gilbert
Now Playing7minBefore I die I want to ... | Candy Chang
Now Playing16minNever, ever give up | Diana Nyad
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Now Playing20minSleep is your superpower | Matt Walker
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Now Playing24minThe new era of positive psychology | Martin Seligman
Now Playing21minThe power of vulnerability | Brené Brown
Now Playing12minWhy the secret to success is setting the right goals | John Doerr
Now Playing19minWe the People, and the Republic we must reclaim | Lawrence Lessig
Now Playing11minHow to make work-life balance work | Nigel Marsh
Now Playing22minThe revolutionary power of diverse thought | Elif Shafak
Now Playing22minThe mind behind Linux | Linus Torvalds
Now Playing16minThe biology of our best and worst selves | Robert Sapolsky
Now Playing7minEveryday leadership | Drew Dudley
Now Playing19minFlow, the secret to happiness | Mihaly Csikszentmihalyi
Now Playing17minDictators hate political cartoons -- so I keep drawing them | Rayma Suprani
Now Playing5minHow to succeed? Get more sleep | Arianna Huffington
Now Playing11minAn ultra-low-cost college degree | Shai Reshef
Now Playing22minHow to run a company with (almost) no rules | Ricardo Semler
Now Playing19minMy year of saying yes to everything | Shonda Rhimes
Now Playing12minTake "the Other" to lunch | Elizabeth Lesser
Now Playing24minWe need to talk about an injustice | Bryan Stevenson
Now Playing13minThe difference between healthy and unhealthy love | Katie Hood
Now Playing17minOptical illusions show how we see | Beau Lotto
Now Playing8minEvery kid needs a champion | Rita Pierson
Now Playing10minI am the son of a terrorist. Here's how I chose peace. | Zak Ebrahim
Now Playing18minWhere good ideas come from | Steven Johnson
Now Playing28minInnovating to zero! | Bill Gates
Now Playing6minHow to control someone else's arm with your brain | Greg Gage
Now Playing19minThe moral roots of liberals and conservatives | Jonathan Haidt
Now Playing30minDepression, the secret we share | Andrew Solomon
Now Playing17minWhat it's like to be Muslim in America | Dalia Mogahed
Now Playing18minChoice, happiness and spaghetti sauce | Malcolm Gladwell
Now Playing22minWhy do we sleep? | Russell Foster
Now Playing20minThe game that can give you 10 extra years of life | Jane McGonigal
Now Playing18minThe mathematics of love | Hannah Fry
Now Playing8minHidden miracles of the natural world | Louie Schwartzberg
Now Playing12min10 ways to have a better conversation | Celeste Headlee
Now Playing14minHow we can turn the cold of outer space into a renewable resource | Aaswath Raman
Now Playing18minWhat explains the rise of humans? | Yuval Noah Harari
Now Playing21minHow the worst moments in our lives make us who we are | Andrew Solomon
Now Playing17minHow changing your story can change your life | Lori Gottlieb
Now Playing24minHow humans and animals can live together | Jane Goodall
Now Playing19minHow to spot a liar | Pamela Meyer
Now Playing18minTales of passion | Isabel Allende
Now Playing12minWhy you think you're right -- even if you're wrong | Julia Galef
Now Playing12minYou can grow new brain cells. Here's how | Sandrine Thuret
Now Playing19minWhat hallucination reveals about our minds | Oliver Sacks
Now Playing18minWhy we all need to practice emotional first aid | Guy Winch