Jessi and Squeaks experiment with mixing things together and learn how to create a lot of foam!

What do we say to kids when intensely traumatic events interrupt everyday life? Whether you're a teacher, parent or community builder, educator Kristen Nguyen provides three research-backed steps for navigating these difficult...

Confronting climate change makes for better cities and a better quality of life, says Heidi Sørensen, director of the climate agency for the city of Oslo, Norway. From construction sites without noise pollution to fully electric...

Youth leader Shreya Joshi diagnoses a key source of political polarization in the US and shows why having "uncomfortable conversations" with people you disagree with is crucial to bridging the divide. "When we are able to recognize what...

When human rights advocate Manu Peni returned to Papua New Guinea from abroad, he built a home for himself using modern techniques -- and promptly learned a harsh lesson on how the newest ideas aren't always the best ideas. Peni calls...

Lawyers are advocates for their clients -- and, in court, they're usually the ones who do the talking. Should that always be the case? In an effort to shift this power dynamic, TED Fellow and legal aid activist Lam Ho shares how lawyers...

Eighty percent of the world's biodiversity is within Indigenous territories, yet these communities often don't have a say when it comes to protecting the lands they inhabit. Environmental activist Jupta Itoewaki explains why Indigenous...

You are constantly becoming a new person, says journalist Shankar Vendantam. In a talk full of beautiful storytelling, he explains the profound impact of something he calls the "illusion of continuity" -- the belief that our future...

Climate justice activist Vanessa Nakate sits down with former president of Ireland Mary Robinson for an enlightening, intergenerational conversation about the state of the climate crisis. Nakate paints a picture of life in her home...

Whose pleasure is prioritized during sex, and why? Psychosexologist Karen Gurney explains how a lack of equal pleasure in the bedroom actually reflects broader gender inequality in society -- and asks you to reconsider what dynamics are...

After a week of studying, you feel confident that you'll ace your exam. But when you get your grade back, it's much lower than you expected. You're devastated, and the disappointment is hard to shake. Should you be trying to look on the...

Things have been getting more and more complicated here in Crash Course Organic Chemistry, and as we deal with more complex molecules, parts of molecules we don’t want to react will start reacting along with the parts that we do....

What is the derivative of a^x? Why is e^x its own derivative? This video shows how to think about the rule for differentiating exponential functions.

Scientists know that genetic factors can explain many of autism’s features - but have autism researchers been looking for those features in the wrong DNA? A new study uses A.I. to uncover changes linked to autism in the stretches of non...

Today, Craig Benzine is going to dive into the factors that influence judicial decisions. As you may have noticed, the Supreme Court recently handed down some pretty big decisions on same-sex marriage (in Obergefell v Hodges) and the...

Introduction to the derivatives of polynomial terms and trigonometric functions thought about geometrically and intuitively. The goal is for these formulas to feel like something the student could have discovered, rather than something...

An overview of what calculus is all about, with an emphasis on making it seem like something students could discover for themselves. The central example is that of rediscovering the formula for a circle's area, and how this is an...

A method for thinking about high-dimensional spheres, introduced in the context of a classic example involving a high-dimensional sphere inside a high-dimensional box.

What is the derivative of a^x? Why is e^x its own derivative? This video shows how to think about the rule for differentiating exponential functions.

The product rule and chain rule in calculus can feel like they were pulled out of thin air, but is there an intuitive way to think about them?

The third and final part of the block collision sequence.

What is a change of basis, and how do you do it?

Is art worth it? "Hell yeah," says graphic novelist R. Alan Brooks -- art has the power to scare dictators, inspire multitudes and change hearts and minds across the world. Reflecting on his journey to become an artist at a time when the...

A throbbing, pounding headache. Bright zigzagging lines across your field of vision. Sensitivity to light, lingering fatigue, disrupted sleep. While an incapacitating headache is one of the most common symptoms, a migraine can include...