The next step toward a holodeck might be the ability to actually touch a simulation, and we’re getting closer—using sound.

As Covid-19 vaccines make it into more and more people's arms, you may be hearing that the second dose can be a little rough. But, while it may be unpleasant, these intense side-effects are actually a sign that the vaccines are working....

Bill Gates talks best (and worst) case scenarios for the coronavirus pandemic in the months ahead, explaining the challenges of reducing virus transmission, providing an update on promising vaccine candidates, offering his thoughts on...

From mourning orcas to distressed elephants, biological anthropologist Barbara J. King has witnessed grief and love across the animal kingdom. In this eye-opening talk, she explains the evidence behind her belief that many animals...

Even though depression and anxiety are different types of disorders, they tend to go together. But why can it happen?

Have you had your daily dose of fun? It's not just enjoyable, it's also essential for your health and happiness, says science journalist Catherine Price. She proposes a new definition of fun -- what she calls "true fun" -- and shares...

From populist demagogues, we will learn the indispensability of democracy, says novelist elif Shafak. "From isolationists, we will learn the need for global solidarity. And from tribalists, we will learn the beauty of cosmopolitanism." A...

Have you ever wondered why you feel better after a good, hearty sob? Well, it turns out the reasons are kind of a mystery, and they range from social support to brain temperature.

Tennis legend Billie Jean King isn't just a pioneer of women's tennis -- she's a pioneer for women getting paid. In this freewheeling conversation, she talks about identity, the role of sports in social justice and the famous Battle of...

News about climate change is often full of doom, guilt, and anxiety. This can make many people reluctant to pay attention to or discuss it. We asked former Vice President Al Gore to help us find a different way to talk about climate change.

Chris Milk uses innovative technologies to make personal, interactive, human stories. Accompanied by Joshua Roman on cello and McKenzie Stubbert on piano, Milk traces his relationship to music and art -- from the first moment he...

Joe Gebbia, the co-founder of Airbnb, bet his whole company on the belief that people can trust each other enough to stay in one another's homes. How did he overcome the stranger-danger bias? Through good design. Now, 123 million hosted...

Whether people are gambling, haggling, or just doing their best to save lives out there, losing is tough to deal with.

When a psychologist who studies well-being ends up with a brain tumor, what happens when she puts her own research into practice? Christina Costa goes beyond the "fight" narrative of cancer -- or any formidable personal journey -- to...

Hank faces off against his Crash Course co-worker Evelyn from the Internets in this test of wits and sticky science knowledge! Who will win and who will lose?

Questionable phone calls, concerning emails, heart-rending stories from a sudden new friend in need of endless financial support: elder abuse can take many forms, says lawyer Jane Walsh. And as technology becomes more sophisticated,...

To move forward in the United States, we must look back and confront the difficult history that has shaped widespread injustice. Revisiting a significant yet overlooked piece of the past, Hasan Kwame Jeffries emphasizes the need to weave...

Love is a complicated combination of brain chemicals and behavior that scientists are only just beginning to figure out. And it's remarkable that in every society that we have looked at on Earth, romantic love exists. So if love is so...

In a culture where being social and outgoing are prized above all else, it can be difficult, even shameful, to be an introvert. But, as Susan Cain argues in this passionate talk, introverts bring extraordinary talents and abilities to...

The words we use to describe our emotions affect how we feel, says historian Tiffany Watt Smith, and they've often changed (sometimes very dramatically) in response to new cultural expectations and ideas. Take nostalgia, for instance:...

Vivid dreams have gotten pretty common during the Covid-19 pandemic and there’s a good psychological reason for that.

The introduction to a series on visualizing core ideas of linear algebra.

Visual artist Helen Marriage stages astonishing, large-scale public art events that expand the boundaries of what's possible. In this visual tour of her work, she tells the story of three cities she transformed into playgrounds of the...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Ryan Lobo has traveled the world, taking photographs that tell stories of unusual human lives. In this haunting...