TED-Ed

Explore the wonderfully bizarre life of the sea cucumber, and discover the essential role they play in keeping ocean ecosystems healthy.

Uploaded 30-04-20

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Is it a fuzzy sock? An overripe banana? A moldy tube of toothpaste? No! In fact, it’s a humble sea cucumber: a brainless, fleshy form surrounding a digestive tract, and bookended by a mouth and an anus. And while it might look odd, its daily toil paves the way for entire ecosystems to thrive. Cella Wright journeys to the bottom of the ocean to explore the lives of these sausage-shaped wonders.

Lesson by Cella Wright, directed by Guto BR, Flávia Godoy and Lívia Serri Francoio.

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View full lesson: https://ed.ted.com/lessons/the-most-important-anus-in-the-ocean-cella-wright

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You’re a vampire hunter entering the enemy’s lair. Can you outsmart this tricky brainteaser and vanquish the vampires?

Uploaded 28-01-19

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You’ve stealthily descended into the darkness of a vampire cave, setting a sequence of mirrors as you go. When the sun reaches the right angle in the sky, a beam of light will ricochet along the mirrors, strike a diffuser, and illuminate the great chamber where the vampires sleep. Can you place the diffuser correctly and flood the lair with sunlight? Dan Finkel shows how.

Lesson by Dan Finkel, directed by Artrake Studio.

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View full lesson: https://ed.ted.com/lessons/can-you-solve-the-vampire-hunter-riddle-dan-finkel

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View full lesson: http://ed.ted.com/lessons/chip-conley-measuring-what-makes-life-worthwhile

When the dot-com bubble burst, hotelier Chip Conley went in search of a business model based on happiness. In an old friendship with an employee and in the wisdom of a Buddhist king, he learned that success comes from what you count. Chip Conley creates joyful hotels, where he hopes his employees, customers and investors alike can realize their full potential. His books share that philosophy with the wider world.

Talk by Chip Conley.

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More and more people worldwide are living in countries not considered their own. Writer Pico Iyer -- who himself has three or four "origins" -- meditates on the meaning of home, the joy of traveling and the serenity of standing still.

Uploaded 23-08-13

Talk by Pico Iyer.



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Explore the relationship between viruses and their hosts, and find out how the evolutionary adaptations of bats keep them safe from viruses.

Uploaded 26-01-21

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Consider a bat that is infected with several deadly viruses, including ones that cause rabies, SARS, and Ebola. While this diagnosis would be lethal for other mammals, the winged wonder is totally unfazed, and may even spend the next 30 years living as if this were totally normal— because for bats, it is. So what’s protecting bats from these dangerous infections? Arinjay Banerjee investigates.

Lesson by Arinjay Banerjee, directed by Cabong Studios.

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View full lesson: https://ed.ted.com/lessons/why-bats-don-t-get-sick-arinjay-banerjee
Dig deeper with additional resources: https://ed.ted.com/lessons/why-bats-don-t-get-sick-arinjay-banerjee#digdeeper

Animator's website: https://www.cabongstudios.com.br/
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View full lesson: http://ed.ted.com/lessons/a-tap-dancer-s-craft-andrew-nemr

Tap dance, born out of the marriage of African and European dance traditions, went from extremely popular to barely existent to grand revival, all in under a century. Professional tap dancer and TED Fellow Andrew Nemr taps into the history of this truly American art form.

Lesson by Andrew Nemr, produced by TED-Ed.

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View full lesson: http://ed.ted.com/lessons/how-we-see-color-colm-kelleher

There are three types of color receptors in your eye: red, green and blue. But how do we see the amazing kaleidoscope of other colors that make up our world? Colm Kelleher explains how humans can see everything from auburn to aquamarine.

Talk by Colm Kelleher, animation by TED-Ed.

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Dive into Salman Rushdie’s masterpiece, “Midnight’s Children,” a work of magical realism that deals with India’s transition from British colonialism to independence.

Uploaded 10-09-19

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It begins with a countdown. A woman goes into labor as the clock ticks towards midnight. Across India, people wait for the declaration of independence after nearly 200 years of British rule. At the stroke of midnight, an infant and two new nations are born in perfect synchronicity. These events form the foundation of “Midnight’s Children.” Iseult Gillespie explores Salman Rushdie’s dazzling novel.

Lesson by Iseult Gillespie, directed by Tomás Pichardo-Espaillat.

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View full lesson: https://ed.ted.com/lessons/why-should-you-read-midnight-s-children-isuelt-gillespie

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Trace the storied history of the game of chess, from its origins in 7th century India to the computer software we use today.

Uploaded 12-09-19

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The attacking infantry advances, their elephants already having broken the defensive line. The king tries to retreat, but the enemy flanks him from the rear. Escape is impossible. This isn’t a real war— nor is it just a game. Over the 1,500 years of its existence, chess has been known as a military strategy tool, a metaphor for human affairs and a measure of genius. Alex Gendler shares its history.

Lesson by Alex Gendler, directed by Remus and Kiki.

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View full lesson: https://ed.ted.com/lessons/a-brief-history-of-chess-alex-gendler

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View full lesson: http://ed.ted.com/lessons/activation-energy-kickstarting-chemical-reactions-vance-kite

Chemical reactions are constantly happening in your body -- even at this very moment. But what catalyzes these important reactions? Vance Kite explains how enzymes assist the process, while providing a light-hearted way to remember how activation energy works.

Lesson by Vance Kite, animation by Ledfish.

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