TED-Ed

Discover the quirky creature known as the parrotfish, and the key role it plays in keeping coral reefs healthy and thriving.

Uploaded 04-08-20

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As the sun rises over a quiet coral reef, one animal breaks the morning silence. Named for its vibrant scales and beak-like teeth, the parrotfish devours a particularly crunchy breakfast: rocks. Why would any creature take bites out of the seafloor? Mike Gil explores how these quirky and flashy foragers play a key role in defending the essential coral reef ecosystem.

Lesson by Mike Gil, directed by Franz Palomares.

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View full lesson: https://ed.ted.com/lessons/the-big-beaked-rock-munching-fish-that-protect-coral-reefs-mike-gil

Thank you so much to our patrons for your support! Without you this video would not be possible! Jose Arcadio Valdes Franco, Brandy Sarver, Guy Hardy, Tu-Anh Nguyen, Karl Laius, Madee Lo, JY Kang, Marc Bou Zeid, Abhishek Goel, Charles A Hershberger, Coenraad Keuning, Robert Seik, Heidi Stolt, Alexis Hevia, Todd Gross, Brady Jones, Christina Salvatore, Zhong Ming Zenny Tan, Karisa Caudill, Bruno Pinho, Derek Drescher, Mihail Radu Pantilimon, Amin Shahril, Mohamed Elsayed, Barthélémy Michalon, Chumi Ogbonna, Karlee Finch, Mohammad Said, jj5252, Kelvin Lam, Mauricio Basso, Athena Grace Franco, Tirath Singh Pandher, Melvin Williams, Tsz Hin Edmund Chan, Nicolas Silva, Raymond Lee, Kurt Almendras, Denise A Pitts, Abdallah Absi, Dee Wei, Richard A Berkley, Tim Armstrong, Daniel Nester, Hashem Al, denison martins fernandes, Doug Henry, Arlene Spiegelman, Michał Friedrich and Joshua Wasniewski.



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View full lesson: http://ed.ted.com/lessons/stories-legacies-of-who-we-are

Storyteller and educator Awele Makeba combines performing arts and history to tell a powerful story from the American civil rights movement.

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We all use our body on a daily basis, and yet few of us think about our physicality the way Wayne McGregor does. He demonstrates how a choreographer communicates ideas to an audience, working with two dancers to build phrases of dance, live and unscripted, on the TEDGlobal stage.

Talk by Wayne McGregor.

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View full lesson: http://ed.ted.com/lessons/how-to-spot-a-counterfeit-bill-tien-nguyen

Uploaded 16-04-15

Authentic dollar bills are equipped with many security features to make them difficult to forge. But that doesn’t stop counterfeiters from trying to fool people with fakes. Luckily, anyone can help catch a counterfeit; all you need are a few simple tools and a bit of chemistry. Tien Nguyen details the chemistry behind counterfeit cash.

Lesson by Tien Nguyen, animation by Lippy.



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View full lesson: http://ed.ted.com/lessons/the-strengths-and-weaknesses-of-acids-and-bases-george-zaidan-and-charles-morton

Uploaded 24-10-13

Vinegar may have a powerful smell, but did you know it's actually a weak acid? In the chemical economy, acids actively give away their protons while bases actively collect them -- but some more aggressively than others. George Zaidan and Charles Morton use the currency of subatomic particles to explain this unseen exchange.

Lesson by George Zaidan and Charles Morton, animation by Karrot Animation



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View full lesson: http://ed.ted.com/lessons/how-we-conquered-the-deadly-smallpox-virus-simona-zompi

Uploaded 28-10-13

For 10,000 years, humanity suffered from the scourge of smallpox. The virus killed almost a third of its victims within two weeks and left survivors horribly scarred. But Simona Zompi commends the brave souls -- a Buddhist nun, a boy, a cow, a dairymaid and physician Edward Jenner -- who first stopped the spread of this disastrous disease, to make us smallpox-free today.

Lesson by Simona Zompi, animation by Augenblick Studios.



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Explore the ancient methods of growing glaciers, the homemade bodies of ice used as water sources, and how they can be used to combat climate change.

Uploaded 04-04-19

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In the 13th century, Genghis Khan embarked on a mission to take over Eurasia, swiftly conquering countries and drawing them into his empire. But, legend has it that there was one obstacle that even he couldn’t overcome: a towering wall of ice, grown by locals across a mountain pass. M Jackson explores the ancient methods of growing glaciers and how they can be used to combat climate change.

Lesson by M Jackson, directed by Artrake Studio.

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View full lesson: https://ed.ted.com/lessons/how-to-grow-your-own-glacier-m-jackson

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Building a skyscraper? Forget about steel and concrete, says architect Michael Green, and build it out of ... wood. As he details in this intriguing talk, it's not only possible to build safe wooden structures up to 30 stories tall (and, he hopes, higher), it's necessary.

Uploaded 16-08-13

Talk by Michael Green.



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Uploaded 24-04-18

View full lesson: https://ed.ted.com/lessons/the-rise-and-fall-of-the-assyrian-empire-marian-h-feldman

Before the sun never set on the British Empire; before Genghis Khan swept the steppe; before Rome extended its influence to encircle the Mediterranean Sea; there was ancient Assyria. Considered by historians to be the first true empire, Assyria’s innovations laid the groundwork for every superpower that has followed. Marian H Feldman details the rise and fall of the Assyrian Empire.

Lesson by Marian H Feldman, animation by Naghmeh Farzaneh.

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Discover what causes acid rain, and how scientists were able to largely eliminate this major environmental threat.

Uploaded 13-04-21

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In 1963, scientists studying Hubbard Brook Experimental Forest made a shocking discovery. Their most recent rainfall samples were nearly 100 times more acidic than usual; which could destroy the area’s ecosystems in a matter of decades. What was causing this deadly rainfall? And what could be done to stop it? Joseph Goffman details how scientists transformed this major threat into a minor issue.

Lesson by Joseph Goffman, directed by Nick Hilditch.

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View full lesson: https://ed.ted.com/lessons/should-you-be-worried-about-acid-rain-joseph-goffman
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Animator's website: http://nickhilditch.com
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