We're bringing gameplay into more aspects of our lives, spending countless hours -- and real money -- exploring virtual worlds for imaginary treasures. Why? As Tom Chatfield shows, games are perfectly tuned to dole out rewards that...

The world is changing much more rapidly than most people realize, says business educator Eddie Obeng -- and creative output cannot keep up. In this spirited talk, he highlights three important changes we should understand for better...

Have you ever been sitting down for a long time and had your legs fall asleep? It feels really weird and can make it hard to walk for a little while! So what makes your legs fall asleep, and why does it feel all prickly when they start...

Have you ever been on a ride on the playground that made you really dizzy, like a merry-go-round? Have you ever wondered where that weird, spinning sensation comes from? Jessi and Squeaks have the answer!

Ever wish you had your own secret network of hidden passages? Well some animals do and they might be closer than you think!

When we last left Jessi and Squeaks, Jessi had a big problem: her back was really itchy! Today we'll share our designs for back scratchers and build something to help her out!

Speaking at LIFT 2007, Sugata Mitra talks about his Hole in the Wall project. Young kids in this project figured out how to use a PC on their own -- and then taught other kids. He asks, what else can children teach themselves?

Child prodigy Adora Svitak says the world needs "childish" thinking: bold ideas, wild creativity and especially optimism. Kids' big dreams deserve high expectations, she says, starting with grownups' willingness to learn from children as...

How can we measure what makes a school system work? Andreas Schleicher walks us through the PISA test, a global measurement that ranks countries against one another -- then uses that same data to help schools improve. Watch to find out...

A species of ant has been discovered to rescue and tend to the battle wounds of other ants injured while hunting, and scientists think that this is the first time this behavior has ever been observed in insects.

What swims in rivers and the ocean and is an awesome parent? Jessi and Squeaks talk about the amazing life cycle of salmon.

The weather is warming up where Jessi lives, which means its time for some cool treats! Join Jessi and Squeaks and learn how to whip up some tasty vanilla ice cream!

From pancakes to ice cream, salt goes in so many things to make them taste better! But what is it and where does it come from?

After learning about mitosis and meiosis from our individual videos, explore the stages side by side in this split screen video by The Amoeba Sisters! Expand video details for table of contents. Vocabulary in this video includes...

Already watched the Amoeba Sisters first video on enzymes and ready to explore a little more? In this video, the Amoeba Sisters cover a few examples of enzymes in the human body before emphasizing that enzymes are found in all the...

In which John Green teaches you about America's "peculiar institution," slavery. I wouldn't really call it peculiar. I'd lean more toward horrifying and depressing institution, but nobody asked me. John will talk about what life was like...

Jessi and Squeaks love getting interesting science questions from their friends! Join them as they check their email and answer questions from kids like you!

In which John Green teaches you about the Cold War, which was the decades long conflict between the USA and the USSR. The Cold War was called cold because of the lack of actual fighting, but this is inaccurate. There was plenty of...

Jessi got so cold outside that she got goosebumps! Join her and Squeaks as they learn what causes your body to make these bumps in the first place.

Jessi and Augusto from Animal Wonders talk with Hank about how they got their really cool jobs. Plus they introduce Hank to a Mali uromastyx!

When you think of antihistamines, you're probably only thinking about getting rid of a runny nose, but we're learning that antihistamines can be used for nausea, insomnia, and even depression!

Jessi and Squeaks were supposed to go sledding today, but it's really cold outside! That won't stop them from having fun, though! Join them as they look back on some great experiments to do on a freezing cold day!

High school science teacher Tyler DeWitt was ecstatic about his new lesson plan on bacteria (how cool!) -- and devastated when his students hated it. The problem was the textbook: it was impossible to understand. He delivers a rousing...

The Hayabusa2 spacecraft fired a bullet into an asteroid and Neptune officially has 14 moons!