TED-Ed

In this wide-ranging, thought-provoking talk, Kevin Kelly muses on what technology means in our lives -- from its impact at the personal level to its place in the cosmos. (Filmed at TEDxAmsterdam.)

Uploaded 25-07-13

Talk by Kevin Kelly.



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In the deepest, darkest parts of the oceans are ecosystems with more diversity than a tropical rainforest. Taking us on a voyage into the ocean -- from the deepest trenches to the remains of the Titanic -- marine biologist David Gallo explores the wonder and beauty of marine life.

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In the first of a new TED-Ed series designed to catalyze curiosity, TED Curator Chris Anderson shares his boyhood obsession with quirky questions that seem to have no answers.

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View full lesson: http://ed.ted.com/lessons/why-is-biodiversity-so-important-kim-preshoff

Uploaded 20-04-15

Our planet’s diverse, thriving ecosystems may seem like permanent fixtures, but they’re actually vulnerable to collapse. Jungles can become deserts, and reefs can become lifeless rocks. What makes one ecosystem strong and another weak in the face of change? Kim Preshoff details why the answer, to a large extent, is biodiversity.

Lesson by Kim Preshoff, animation by TED-Ed.



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Adam Savage walks through two spectacular examples of profound scientific discoveries that came from simple, creative methods anyone could have followed -- Eratosthenes' calculation of the Earth's circumference around 200 BC and Hippolyte Fizeau's measurement of the speed of light in 1849.

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View full lesson: http://ed.ted.com/lessons/the-fundamentals-of-space-time-part-3-andrew-pontzen-and-tom-whyntie

Uploaded 22-05-14

View part 1: http://ed.ted.com/lessons/the-fundamentals-of-space-time-part-1-andrew-pontzen-and-tom-whyntie
View part 2: http://ed.ted.com/lessons/the-fundamentals-of-space-time-part-2-andrew-pontzen-and-tom-whyntie

In the first two lessons of this series on space-time, we've dealt with objects moving at constant speeds, with straight world lines, in space-time. But what happens when you throw gravity into the mix? In this third and final lesson, CERN scientists Andrew Pontzen and Tom Whyntie explore what gravity means for space-time -- or rather, what space-time means for gravity.

Lesson by Andrew Pontzen and Tom Whyntie, animation by Giant Animation Studios.



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You don't need to plan an exotic trip to find creative inspiration. Just look up, says Gavin Pretor-Pinney, founder of the Cloud Appreciation Society. As he shares charming photos of nature's finest aerial architecture, Pretor-Pinney calls for us all to take a step off the digital treadmill, lie back and admire the beauty in the sky above.

Uploaded 16-08-13

Talk by Gavin Pretor-Pinney.



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Explore how snakes evolved, and find out how their jaw-dropping anatomy allows them to take down prey several times their size.

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Since slithering onto the scene some 150 million years ago, evolving length and limbless-ness out of their ancestral lizard forms, snakes have diversified rapidly. Their noodly bodies and flexible heads granted them access to novel places and prey. And today, there are nearly 4,000 snake species, spanning habitats high and low. Niko Zlotnik explores how snakes evolved into incredible predators.

Lesson by Niko Zlotnik, directed by Anna Benner.

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View full lesson: https://ed.ted.com/lessons/how-do-snakes-swallow-animals-so-much-bigger-than-they-are-niko-zlotnik
Dig deeper with additional resources: https://ed.ted.com/lessons/how-do-snakes-swallow-animals-so-much-bigger-than-they-are-niko-zlotnik/digdeeper

Animator's website: https://annabennerstudio.com
Music: https://www.tschernuth.com
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Uploaded 23-04-18

View full lesson: https://ed.ted.com/lessons/why-can-t-you-divide-by-zero

In the world of math, many strange results are possible when we change the rules. But there’s one rule that most of us have been warned not to break: don’t divide by zero. How can the simple combination of an everyday number and a basic operation cause such problems?

Lesson by TED-Ed, animation by Nick Hilditch.

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Dig into the false cause fallacy, which assumes that one event causes another, and learn how to distinguish between correlation and causation.

Uploaded 10-08-20

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It’s 1843, and a debate is raging about one of the most common killers of women: childbed fever— no one knows what causes it. One physician has observed patients with inflammation go on to develop childbed fever, and therefore believes the inflammation causes the fever. What's the problem with this argument? Elizabeth Cox explores the false cause fallacy and how to dissect claims with skepticism.

Lesson by Elizabeth Cox, directed by TOGETHER.

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View full lesson: https://ed.ted.com/lessons/can-you-outsmart-the-fallacy-that-fooled-a-generation-of-doctors-elizabeth-cox

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