TED Talks Daily (HD video)

While studying for his PhD in physics, Uri Alon thought he was a failure because all his research paths led to dead ends. But, with the help of improv theater, he came to realize that there could be joy in getting lost. A call for scientists to stop thinking of research as a direct line from question to answer, but as something more creative. It's a message that will resonate, no matter what your field.

In 2002, investigative journalist and TED Fellow Will Potter took a break from his regular beat, writing about shootings and murders for the Chicago Tribune. He went to help a local group campaigning against animal testing: "I thought it would be a safe way to do something positive," he says. Instead, he was arrested, and so began his ongoing journey into a world in which peaceful protest is branded as terrorism.

The beauty of hackers, says cybersecurity expert Keren Elazari, is that they force us to evolve and improve. Yes, some hackers are bad guys, but many are working to fight government corruption and advocate for our rights. By exposing vulnerabilities, they push the Internet to become stronger and healthier, wielding their power to create a better world.

Stella Young is a comedian and journalist who happens to go about her day in a wheelchair — a fact that doesn’t, she’d like to make clear, automatically turn her into a noble inspiration to all humanity. In this very funny talk, Young breaks down society's habit of turning disabled people into “inspiration porn.”

As a member of both the African American and LGBT communities, filmmaker Yoruba Richen is fascinated with the overlaps and tensions between the gay rights and the civil rights movements. She explores how the two struggles intertwine and propel each other forward — and, in an unmissable argument, she dispels a myth about their points of conflict. A powerful reminder that we all have a stake in equality.

How can robots learn to stabilize on rough terrain, walk upside down, do gymnastic maneuvers in air and run into walls without harming themselves? Robert Full takes a look at the incredible body of the cockroach to show what it can teach robotics engineers.

"We're all going to die -- and poems can help us live with that." In a charming and funny talk, literary critic Stephen Burt takes us on a lyrical journey with some of his favorite poets, all the way down to a line break and back up to the human urge to imagine.

"Human beings are works in progress that mistakenly think they're finished." Dan Gilbert shares recent research on a phenomenon he calls the "end of history illusion," where we somehow imagine that the person we are right now is the person we'll be for the rest of time. Hint: that's not the case.

Two hundred million years ago, our mammal ancestors developed a new brain feature: the neocortex. This stamp-sized piece of tissue (wrapped around a brain the size of a walnut) is the key to what humanity has become. Now, futurist Ray Kurzweil suggests, we should get ready for the next big leap in brain power, as we tap into the computing power in the cloud.

Sting’s early life was dominated by a shipyard—and he dreamed of nothing more than escaping the industrial drudgery. But after a nasty bout of writer’s block that stretched on for years, Sting found himself channeling the stories of the shipyard workers he knew in his youth for song material. In a lyrical, confessional talk, Sting treats us to songs from his upcoming musical, and to an encore of “Message in a Bottle.”

What can we learn from people with the genetics to get sick — who don’t? With most inherited diseases, only some family members will develop the disease, while others who carry the same genetic risks dodge it. Stephen Friend suggests we start studying those family members who stay healthy. Hear about the Resilience Project, a massive effort to collect genetic materials that may help decode inherited disorders.

As a young girl, photojournalist and TED Fellow Kitra Cahana dreamed about running away from home to live freely on the road. Now as an adult and self-proclaimed vagabond, she follows modern nomads into their homes -- boxcars, bus stops, parking lots, rest stop bathrooms -- giving a glimpse into a culture on the margins.

In 1902, President Theodore Roosevelt legendarily spared the life of a black bear -- and prompted a plush toy craze for so-called "teddy bears." Writer Jon Mooallem digs into this toy story and asks us to consider how the tales we tell about wild animals have real consequences for a species' chance of survival -- and the natural world at large.

Civilians don’t miss war. But soldiers often do. Journalist Sebastian Junger shares his experience embedded with American soldiers at Restrepo, an outpost in Afghanistan's Korengal Valley that saw heavy combat. Giving a look at the "altered state of mind" that comes with war, he shows how combat gives soldiers an intense experience of connection. In the end, could it actually be "the opposite of war" that soldiers miss? 

Wes Moore joined the US Army to pay for college, but the experience became core to who he is. In this heartfelt talk, the paratrooper and captain—who went on to write "The Other Wes Moore"—explains the shock of returning home from Afghanistan. He shares the single phrase he heard from civilians on repeat, and shows why it's just not sufficient. It's a call for all of us to ask veterans to tell their stories — and listen.