* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. When Nancy Lublin started texting teenagers to help with her social advocacy organization, what she found was...

The "dismal science" truly shines in this optimistic talk, as economist Alex Tabarrok argues free trade and globalization are shaping our once-divided world into a community of idea-sharing more healthy, happy and prosperous than...

Rob Forbes, the founder of Design Within Reach, shows a gallery of snapshots that inform his way of seeing the world. Charming juxtapositions, found art, urban patterns -- this slideshow will open your eyes to the world around you.

Sir Ken Robinson makes an entertaining and profoundly moving case for creating an education system that nurtures (rather than undermines) creativity.

It's not the passage of time that makes it so hard to get older. It's ageism, a prejudice that pits us against our future selves -- and each other. Ashton Applewhite urges us to dismantle the dread and mobilize against the last socially...

Wofford College president Bernie Dunlap tells the story of Sandor Teszler, a Hungarian Holocaust survivor who taught him about passionate living and lifelong learning.

As we reboot the world's economy, Geoff Mulgan poses a question: Instead of sending bailout money to doomed old industries, why not use stimulus funds to bootstrap some new, socially responsible companies -- and make the world a little...

When Lesley Hazleton was writing a biography of Muhammad, she was struck by something: The night he received the revelation of the Koran, according to early accounts, his first reaction was doubt, awe, even fear. And yet this experience...

In 1990, the Italian government enlisted top engineers to stabilize Pisa's famous Leaning Tower. There'd been many attempts during its 800 year history, but computer models revealed the urgency of their situation. The tower would topple...

In this practical talk, cybersecurity expert Nadya Bartol brings this crucial topic out into the open, lifting the shame around tech mistakes and offering creative ways to celebrate and reward good cybersecurity habits at work and...

Is our obsession with efficiency actually making us less efficient? In this revelatory talk, writer and historian Edward Tenner discusses the promises and dangers of our drive to get things done as quickly as possible -- and suggests...

The 40 or so muscles in the human face can be activated in different combinations to create thousands of expressions. But do these expressions look the same and communicate the same meaning around the world regardless of culture? Is one...

Want to learn a new language but feel daunted or unsure where to begin? You don't need some special talent or a "language gene," says Lýdia Machová. In an upbeat, inspiring talk, she reveals the secrets of polyglots (people who speak...

The Socotra archipelago in the Arabian Sea supports so many diverse and unique species that it has been described as the most alien place on Earth. Hank takes you on a tour of this weird place in this episode of SciShow.

What drives someone to kill in cold blood? What goes through the murderer's mind? And what kind of a society breeds such people? Over 150 years ago Fyodor Mikhailovich Dostoyevsky took these questions up in what would become one of the...

Can Twitter be saved? In a wide-ranging conversation with TED's Chris Anderson and Whitney Pennington Rodgers, Twitter CEO Jack Dorsey discusses the future of the platform -- acknowledging problems with harassment and moderation and...

The feeling of security and the reality of security don't always match, says computer-security expert Bruce Schneier. In his talk, he explains why we spend billions addressing news story risks, like the "security theater" now playing at...

In the United States, the agencies that govern prisons are often called 'Department of Corrections.' And yet, their focus is on containing and controlling inmates. Dan Pacholke, Deputy Secretary for the Washington State Department of...

Jason Fried has a radical theory of working: that the office isn't a good place to do it. He calls out the two main offenders (call them the M&Ms) and offers three suggestions to make the workplace actually work.

In this short, amazing demo, Fabian Hemmert imagines one future of the mobile phone -- a shape-shifting and weight-shifting handset that "displays" information nonvisually. It's a delightfully intuitive way to communicate.

Women and girls are conditioned to believe success is "a seat at the table." Creator, actress and author Lilly Singh thinks we need to build a better table. In this hilarious, incisive talk, Singh traces the arc of her career from...

Noah Feldman makes a searing case that both politics and religion -- whatever their differences -- are similar technologies, designed to efficiently connect and manage any group of people.

Tom Wujec presents some surprisingly deep research into the "marshmallow problem" -- a simple team-building exercise that involves dry spaghetti, one yard of tape and a marshmallow. Who can build the tallest tower with these ingredients?...

In the early 1900s, archaeologist Sir Arthur Evans uncovered nearly 3,000 tablets inscribed with strange symbols. He thought the script, dubbed Linear B, represented the Minoan language, while others came up with their own theories. Was...