The Chinese internet has grown at a staggering pace -- it now has more users than the combined populations of the US, UK, Russia, Germany, France and Canada. Even with its imperfections, the lives of once-forgotten populations have been irrevocably elevated because of it, says South China Morning Post CEO Gary Liu. In a fascinating talk, Liu det...

As a humanist, Leo Igwe doesn't believe in divine intervention -- but he does believe in the power of human beings to alleviate suffering, cure disease, preserve the planet and turn situations of poverty into prosperity. In this bold talk, Igwe shares how humanism can free Africans from damaging superstitions and give them the power to rebuild t...

"We are living through the tech-enabled unraveling of full-time employment itself," says anthropologist Mary L. Gray. As the pandemic exposes and accelerates the shift to on-demand online labor, Gray takes us inside the jobs being created to solve the problems artificial intelligence can't handle -- and explains why our economic recovery hinges ...

Lindy Lou Isonhood served as Juror No. 2 on a capital murder trial in 1994 -- an experience that changed her life.

When the pressure is on, why do we sometimes fail to live up to our potential? Cognitive scientist and Barnard College president Sian Leah Beilock reveals what happens in your brain and body when you choke in stressful situations, sharing psychological tools that can help you perform at your best when it matters most.

Louie Schwartzberg is a cinematographer, director and producer who captures breathtaking images that celebrate life -- revealing connections, universal rhythms, patterns and beauty.

Across sub-Saharan Africa, small farmers are the bedrock of national and regional economies—unless the weather proves unpredictable and their crops fail. The solution is insurance, at a vast, continental scale, and at a very low, affordable cost. Rose Goslinga and the Syngenta Foundation for Sustainable Agriculture pioneered an unconventional wa...

The coldest materials in the world aren't in Antarctica or at the top of Mount Everest. They're in physics labs: clouds of gases held just fractions of a degree above absolute zero. Lina Marieth Hoyos explains how temperatures this low give scientists a window into the inner workings of matter, and allow engineers to build incredibly sensitive i...

TED Fellow Zubaida Bai works with medical professionals, midwives and mothers to bring dignity and low-cost interventions to women's health care. In this quick, inspiring talk, she presents her clean birth kit in a purse, which contains everything a new mother needs for a hygienic birth and a healthy delivery -- no matter where in the world (or ...

Mary Lou Jepsen pushes the edges of what's possible in optics and physics, to make new types of devices, leading teams and working with huge factories that can ship vast volumes of these strange, new things.

Two-thirds of the world may not have access to the latest smartphone, but local electronic shops are adept at fixing older tech using low-cost parts. Vinay Venkatraman explains his work in "technology crafts," through which a mobile phone, a lunchbox and a flashlight can become a digital projector for a village school, or an alarm clock and a m...

Managing your money can feel scary and complicated -- but it doesn't have to be. In this new TED series, behavioral scientist Wendy De La Rosa explains why we spend too much and save too little and shares easy steps to help us achieve a more secure financial future. (Made possible with the support of Wells Fargo)

If you're undergoing surgery, you want the best surgical team to collaborate on your case, no matter where they are. Surgeon and entrepreneur Nadine Hachach-Haram is developing a new system that helps surgeons operate together and train one another on new techniques -- from remote locations using low-cost augmented reality tools. Watch the syste...

"There are a lot of resources given by nature for free -- all we need is our sensitivity to see them and our creativity to use them," says architect Anna Heringer. Heringer uses low-tech materials like mud and bamboo to create structures from China to Switzerland, Bangladesh and beyond. Visit an awe-inspiring school, an elegant office and cozy s...

Elephants communicate using sounds deeper than the human ear can detect. Biologist Beth Mortimer and geophysicist Tarje Nissen-Meyer plan to eavesdrop on their conversations using a noninvasive, real-time and low-cost study method that can also potentially help locals in developing countries fight poaching. Learn how they keep an ear to the grou...

Today's AI algorithms require tens of thousands of expensive medical images to detect a patient's disease. What if we could drastically reduce the amount of data needed to train an AI, making diagnoses low-cost and more effective? TED Fellow Pratik Shah is working on a clever system to do just that. Using an unorthodox AI approach, Shah has deve...

Euna Lee strives to be a voice for the voiceless and a window for those with no access to outside information.

William Li heads the Angiogenesis Foundation, a nonprofit that is re-conceptualizing global disease fighting.

Great life advice for the moment after you throw your mortarboard in the air.

Researcher Johnny Lee became a YouTube star with his demo of Wii Remote hacks -- bending the low-cost game piece to power an interactive whiteboard, a multitouch surface, a head-mounted display ...

Jinha Lee wants to weave digital computing into the flow of our physical reality.

The world around us is mainly made of two things: nature and the materials that we extract from it. To fight climate change, we need to protect and regenerate nature and transform materials into low- or zero-carbon alternatives. Session 4 of the Countdown Global Launch, hosted by Prajakta Koli and Hannah Stocking, features Thomas Crowther, Ernes...

The Italian island of Sardinia has more than six times as many centenarians as the mainland and ten times as many as North America. Why? According to psychologist Susan Pinker, it's not a sunny disposition or a low-fat, gluten-free diet that keeps the islanders healthy -- it's their emphasis on close personal relationships and face-to-face inter...

Joe Lassiter is a deep thinker and straight talker focused on developing clean, secure and carbon-neutral supplies of reliable, low-cost energy. His analysis of the world's energy realities puts a powerful lens on the stubbornly touchy issue of nuclear power, including new designs for plants that can compete economically with fossil fuels. We ha...

In his groundbreaking work, Xu Liu investigated how to activate and deactivate specific memories in mice.

Since 2000, the annual number of people convicted of crimes in the United States has stayed steady, but the average number of people in jail each year has shot up. How can that be? The answer lies in the bail system— which isn't doing what it was intended to do. Camilo Ramirez details how the cash bail system disproportionally hurts people in lo...

Lee Smolin is a theoretical physicist, working mainly in the field of quantum gravity. He's a founding member of the Perimeter Institute for Theoretical Physics in Canada, and the author of The Trouble With Physics.

As a child growing up in North Korea, Hyeonseo Lee thoght her country was the "best on the planet." It wasn't until the famine of the 90s that she began to wonder. She escaped the country at 17-years-old to begin a life in hiding as a refugee in China. Hers is a harrowing, personal tale of survival and hope -- and a powerful reminder of those who face constant danger, even when the border is far behind.

The US health care system assumes many things about patients: that they can take off from work in the middle of the day, speak English, have a working telephone and a steady supply of food. Because of that, it's failing many of those who are most in need, says Mitchell Katz, CEO of the largest public health care system in the US. In this eye-ope...

As CEO of Citizen University, Eric Liu is working to spark a civic revival in the US and beyond.