Ten days after 9/11, a shocking attack at a Texas mini-mart shattered the lives of two men: the victim and the attacker. In this stunning talk, Anand Giridharadas, author of "The True American," tells the story of what happened next....

What is altruism? Put simply, it's the wish that other people may be happy. And, says Matthieu Ricard, a happiness researcher and a Buddhist monk, altruism is also a great lens for making decisions, both for the short and long term, in...

Just a few meters below the waves, marine biologist and explorer-photographer David Gruber discovered something amazing -- a surprising new range of sea creatures that glow in many colors in the ocean's dim blue light. Join his journey...

What if our bodies could help grow new life after we die, instead of being embalmed and buried or turned to ash? Join Katrina Spade as she discusses "recomposition" -- a system that uses the natural decomposition process to turn our...

urban planner Ryan Gravel shares the story of how his hometown of Atlanta, Georgia, rallied to build a massive urban park that will transform an abandoned railroad track into 22 miles of public green space called the Atlanta BeltLine....

I sell dreams, and I peddle love to millions of people, says Shah Rukh Khan, Bollywood's biggest star. In this charming, funny talk, Khan traces the arc of his life, showcases a few of his famous dance moves and shares hard-earned wisdom...

We have seen advances in every aspect of our lives -- except our humanity, says Luma Mufleh, a Jordanian immigrant and Muslim of Syrian descent who founded the first accredited school for refugees in the United States. Mufleh shares...

We must face our fears if we want to get the most out of technology -- and we must conquer those fears if we want to get the best out of humanity, says Garry Kasparov. One of the greatest chess players in history, Kasparov lost a...

What kind of data is your cell phone company collecting? Malte Spitz wasn’t too worried when he asked his operator in Germany to share information stored about him. Multiple unanswered requests and a lawsuit later, Spitz received 35,830...

Earth probably isn’t the best place in the universe. It turns out there might be even better places to live that are even more suitable for life: superhabitable planets.

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The most cost-effective way to save a human life right now is to help give Vitamin A drops to certain groups of people, thanks to the health effects of the drops and the ease of their distribution.

Ever wonder what a dinosaur might have looked like? Well, we might have an answer for you and the result is hidden in plain sight.

Explore some properties of water with the Amoeba Sisters! It's all about those hydrogen bonds.

When Esta Soler lobbied for a bill outlawing domestic violence in 1984, one politician called it the "Take the Fun Out of Marriage Act." "If only I had Twitter then," she mused. In this sweeping, optimistic talk, Soler charts 30 years of...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. An architect of the "Boston miracle," Rev. Jeffrey Brown started out as a bewildered young pastor watching his...

emily Parsons-Lord re-creates air from distinct moments in earth's history -- from the clean, fresh-tasting air of the Carboniferous period to the soda-water air of the Great Dying to the heavy, toxic air of the future we're creating. By...

Soap operas and telenovelas may be (ahem) overdramatic, but as Kate Adams shows us, their exaggerated stories and characters often cast light on the problems of real life. In this sparkling, funny talk, Adams, a former assistant casting...

On August 21, 2017, the moon's shadow raced from Oregon to South Carolina in what some consider to be the most awe-inspiring spectacle in all of nature: a total solar eclipse. umbraphile David Baron chases these rare events across the...

It might feel like it was only yesterday that the Curiosity rover touched down on Mars, but in August, the rover celebrated its fifth birthday! For a kindergartener, it's made some really impressive discoveries.

Theoretically, we could hide the Earth from faraway telescopes, using a properly placed laser pointer.

There’s probably life somewhere besides Earth, but all the exoplanets are so far away we may never see their surfaces in detail or intercept a clear radio signal from them. How do we determine if a distant planet has life?

TV news anchor Lee Thomas thought his career was over after he was diagnosed with vitiligo, an autoimmune disorder that left large patches of his skin without pigment and led to derision and stares. In a captivating talk, he shares how...

What would it take to settle Mars? In a talk about the future of space exploration, Lynn Rothschild reviews the immense challenges to living elsewhere in the universe and proposes some bold, creative solutions to making a home off planet...