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TED - Ideas worth spreading 

How we use astrophysics to study earthbound problems | Federica Bianco

To study a system as complex as the entire universe, astrophysicists need to be experts at extracting simple solutions from large data sets. What else could they do with this expertise? In an interdisciplinary talk, TED Fellow and astrophysicist Federica Bianco explains how she uses astrophysical data analysis to solve urban and social problems -- as well as stellar mysteries.... läs mer »

A free world needs political cartoons | Patrick Chappatte

We need humor like we need the air we breathe, says editorial cartoonist Patrick Chappatte. In a talk illustrated with highlights from a career spent skewering everything from dictators and ideologues to selfies and social media mobs, Chappatte makes a resounding, often hilarious case for the necessity of satire. "Political cartoons were born with democracy, and they are challenged when freedom is," he says.... läs mer »

How climate change could make our food less nutritious | Kristie Ebi

Rising carbon levels in the atmosphere can make plants grow faster, but there's another hidden consequence: they rob plants of the nutrients and vitamins we need to survive. In a talk about global food security, epidemiologist Kristie Ebi explores the potentially massive health consequences of this growing nutrition crisis -- and explores the steps we can take to ensure all people have access to safe, healthy food.... läs mer »

What streaming means for the future of entertainment | Emmett Shear

In a talk and demo, Twitch cofounder Emmett Shear shares his vision for the future of interactive entertainment -- and explains how video game streaming is helping people build communities online. "I am excited for a world where our entertainment could connect us instead of isolating us -- a world where we can bond with each other over our shared interests and create real, strong communities," Shear says.... läs mer »

The dirty secret of capitalism -- and a new way forward | Nick Hanauer

Rising inequality and growing political instability are the direct result of decades of bad economic theory, says entrepreneur Nick Hanauer. In a visionary talk, he dismantles the mantra that "greed is good" -- an idea he describes as not only morally corrosive, but also scientifically wrong -- and lays out a new theory of economics powered by reciprocity and cooperation.... läs mer »

Community-powered criminal justice reform | Raj Jayadev

Community organizer Raj Jayadev wants to transform the US court system through "participatory defense" -- a growing movement that empowers families and community members to impact their loved ones' court cases. He shares the remarkable results of their work -- including more than 4,000 years of "time saved" from incarceration -- and shows how this new model could shift the landscape of power in the courts.... läs mer »

What reading slowly taught me about writing | Jacqueline Woodson

Reading slowly -- with her finger running beneath the words, even when she was taught not to -- has led Jacqueline Woodson to a life of writing books to be savored. In a lyrical talk, she invites us to slow down and appreciate stories that take us places we never thought we'd go and introduce us to people we never thought we'd meet. "Isn't that what this is all about -- finding a way, at the end of the day, to not feel alone in this world, and a way to feel like we've changed it before we leave?" she asks.... läs mer »

How deepfakes undermine truth and threaten democracy | Danielle Citron

The use of deepfake technology to manipulate video and audio for malicious purposes -- whether it's to stoke violence or defame politicians and journalists -- is becoming a real threat. As these tools become more accessible and their products more realistic, how will they shape what we believe about the world? In a portentous talk, law professor Danielle Citron reveals how deepfakes magnify our distrust -- and suggests approaches to safeguarding the truth.... läs mer »

How your emotions change the shape of your heart | Sandeep Jauhar

"A record of our emotional life is written on our hearts," says cardiologist and author Sandeep Jauhar. In a stunning talk, he explores the mysterious ways our emotions impact the health of our hearts -- causing them to change shape in response to grief or fear, to literally break in response to emotional heartbreak -- and calls for a shift in how we care for our most vital organ.... läs mer »

A "living drug" that could change the way we treat cancer | Carl June

Carl June is the pioneer behind CAR T-cell therapy: a groundbreaking cancer treatment that supercharges part of a patient's own immune system to attack and kill tumors. In a talk about a breakthrough, he shares how three decades of research culminated in a therapy that's eradicated cases of leukemia once thought to be incurable -- and explains how it could be used to fight other types of cancer.... läs mer »

How we can make racism a solvable problem -- and improve policing | Phillip Atiba Goff

When we define racism as behaviors instead of feelings, we can measure it -- and transform it from an impossible problem into a solvable one, says justice scientist Phillip Atiba Goff. In an actionable talk, he shares his work at the Center for Policing Equity, an organization that helps police departments diagnose and track racial gaps in policing in order to eliminate them. Learn more about their data-driven approach -- and how you can get involved with the work that still needs to be done. (This ambitious plan is part of the Audacious Project, TED's initiative to inspire and fund global change.)... läs mer »

Why you should be a climate activist | Luisa Neubauer

"I dream of a world where geography classes teach about the climate crisis as this one great challenge that was won by people like you and me," says climate activist Luisa Neubauer. With Greta Thunberg, Neubauer helped initiate "Fridays For Future," the momentous international school strike movement that protests the lack of action on the climate crisis. She shares four first steps that anyone, regardless of age, can take to become a climate activist. "This is not a job for a single generation. This is a job for humanity," she says.... läs mer »

Inside the bizarre world of internet trolls and propagandists | Andrew Marantz

Journalist Andrew Marantz spent three years embedded in the world of internet trolls and social media propagandists, seeking out the people who are propelling fringe talking points into the heart of conversation online and trying to understand how they're making their ideas spread. Go down the rabbit hole of online propaganda and misinformation -- and learn we can start to make the internet less toxic.... läs mer »

"Stumbling towards intimacy": An improvised TED Talk | Anthony Veneziale

In a hilarious, completely improvised talk, improv master Anthony Veneziale takes to the TED stage for a truly one-of-a-kind performance. Armed with an audience-suggested topic ("stumbling towards intimacy") and a deck of slides he's never seen before, Veneziale crafts a meditation on the intersection of love, language and ... avocados?... läs mer »

How porn changes the way teens think about sex | Emily F. Rothman

"The free, online, mainstream pornography that teenagers are most likely to see is a completely terrible form of sex education," says public health researcher Emily F. Rothman. She shares how her mission to end dating and sexual violence led her to create a pornography literacy program that helps teens learn about consent and respect -- and invites them to think critically about sexually explicit media.... läs mer »

What happened when we paired up thousands of strangers to talk politics | Jochen Wegner

In spring 2019, more than 17,000 Europeans from 33 countries signed up to have a political argument with a complete stranger. They were part of "Europe Talks," a project that organizes one-on-one conversations between people who disagree -- sort of like a Tinder for politics. Editor Jochen Wegner shares the unexpected things that happened when people met up to talk -- and shows how face-to-face discussions could get a divided world to rethink itself.... läs mer »

A climate change solution that's right under our feet | Asmeret Asefaw Berhe

There's two times more carbon in the earth's soil than in all of its vegetation and the atmosphere -- combined. Biogeochemist Asmeret Asefaw Berhe dives into the science of soil and shares how we could use its awesome carbon-trapping power to offset climate change. "[Soil] represents the difference between life and lifelessness in the earth system, and it can also help us combat climate change -- if we can only stop treating it like dirt," she says.... läs mer »