How can the lessons of the past help us navigate the turbulence of the present and future? Social philosopher Roman Krznaric explores why history isn’t just a record of what’s gone wrong — it’s also full of solutions, resilience and...

We can learn a lot from dinosaur fossils, but figuring how they behaved is a real challenge.

Squeaks and Jessi use their pretend time machine to go way back in time and meet a creature even older than dinosaurs, called Dimetrodon!



First Grade Next Generation Science
Standards
Crossc
utting...

What's the best way to make a good point? Organizational psychologist Niro Sivanathan offers a fascinating lesson on the "dilution effect," a cognitive quirk that weakens our strongest cases -- and reveals why brevity is the true soul of...

In this powerful talk from TEDGlobal, Rebecca MacKinnon describes the expanding struggle for freedom and control in cyberspace, and asks: How do we design the next phase of the Internet with accountability and freedom at its core, rather...

With its lizard-like appearance and that distinctive sail on it back, Dimetrodon is practically the mascot of the Palaeozoic Era, a time before flowers, birds, mammals, and even crocodiles. But if you take a close look at this...

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...

Yuri Milner's Breakthrough Starshot is an interstellar travel expedition unlike any other before it. It's many years in the making and is contingent on a series of incredible advancements in nanotechnology, materials science and laser...

The ceramics designer Eva Zeisel looks back on a 75-year career. What keeps her work as fresh today (her latest line debuted in 2008) as in 1926? Her sense of play and beauty, and her drive for adventure. Listen for stories from a rich,...

Honestly, “spreadsheets” are kind of the vegetables of the business world -- the very idea of them makes some people queasy. But that’s ok! They can be intimidating, but they’re not impossible to understand. Today we’re going to learn to...

The idea that the Moon is a blown-off chunk of the Earth is known as the giant impact hypothesis - but the presence of carbon on the Moon throws this hypothesis into question.

What's the harm in buying a knock-off purse or a fake designer watch? According to counterfeit investigator Alastair Gray, fakes like these fund terrorism and organized crime. Learn more about the trillion-dollar underground economy of...

One of Jessi and Squeak's favorite things to do on a nice day is to go to the park and fly their homemade kites! Today, Jessi will show you how to build your own kite and tell you how a little wind can send it soaring through the air!

We've launched thousands of spacecraft over the years. And as the space junk around our planet builds up, researchers are working on ways to clean things up using some obvious things, like lasers, and some less obvious ones, like solar...

We can learn a lot from dinosaur fossils, but figuring how they behaved is a real challenge.

When scientists are planning missions, they sometimes have to take into account the fact that the light from the Sun pushes on the spacecraft. But with solar sails, they can also use that pressure to propel the craft along.

On January 17, 1920, less than one hour after spirits had become illegal throughout the United States, armed men robbed a Chicago freight train and made off with thousands of dollars worth of whiskey. It was a first taste of the...

En este video te explicamos qué es una parábola, qué es el movimiento parabólico, y te damos características del movimiento parabólico y ejemplos de movimiento parabólico.

Aprende sobre los adverbios de frecuencia en inglés. Algunos de los adverbios son: never, always, usually, frequently, often, sometimes, occasionally, rarely.

Can you afford a car? Can you afford a house? Most likely the quetsion is no, unless you have some financing options. Firms know this and they have developed a number of pricing tactics that can help inspire customers...

This video provides a clear and concise explanation of percents and how they are used in real-life situations such as shopping and tipping at a restaurant. It breaks down the concept of percents as parts of a whole, specifically one part...

Learn how to calculate *discounts* and *markups* like a pro with Mrs. C! In this lesson, you’ll discover two easy ways to figure out sale prices and original prices:



• *Percent Equation Method* (
a = p × w)
• *Shortcut...

Howcast - Those yummy boots, shoes, or sandals are out there, somewhere, with your name on them – and a much smaller price tag if you heed these tips.

Howcast - No one likes selling a car and feeling like you got taken. Consider these details to be sure that you're in the driver's seat.