TED-Ed

Dig in to the history of the Roman Empire’s staged gladiatorial naval battles and how they flooded the Colosseum to reenact famous battles.

Uploaded 24-06-19

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Starting in 80 CE, residents of Rome and visitors from across the Roman Empire would fill the stands of the Colosseum to see gladiators duel, animals fight and chariots race around the arena. And for the grand finale, water poured into the arena basin, submerging the stage for the greatest spectacle of all: staged naval battles. Janelle Peters details the history of these mock maritime encounters.

Lesson by Janelle Peters, directed by Brett Underhill.

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View full lesson: https://ed.ted.com/lessons/how-the-romans-flooded-the-colosseum-for-sea-battles-janelle-peters

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What if Andy Warhol had it wrong, and instead of being famous for 15 minutes, we're only anonymous for that long? In this short talk, Juan Enriquez looks at the surprisingly permanent effects of digital sharing on our personal privacy. He shares insight from the ancient Greeks to help us deal with our new "digital tattoos."

Uploaded 30-08-13

Talk by Juan Enriquez.



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Dig into the slippery slope fallacy, which assumes that one step will lead to a series of events that lead to an extreme— often bad— scenario.

Uploaded 19-08-21

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It’s 1954. Vietnamese nationalists are on the verge of securing an independent Vietnam under communist leader Ho Chi Minh. U.S. President Eisenhower claims that by virtue of the "falling domino principle," communist control of Vietnam would lead to the global spread of authoritarian communist regimes. Can you spot the problem with this argument? Elizabeth Cox explores the slippery slope fallacy.

Lesson by Elizabeth Cox, directed by TOGETHER.

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View full lesson: https://ed.ted.com/lessons/can-you-outsmart-the-slippery-slope-fallacy-elizabeth-cox
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View full lesson: http://ed.ted.com/lessons/how-do-we-measure-distances-in-space-yuan-sen-ting

Uploaded 09-10-14

When we look at the sky, we have a flat, two-dimensional view. So how do astronomers figure the distances of stars and galaxies from Earth? Yuan-Sen Ting shows us how trigonometric parallaxes, standard candles and more help us determine the distance of objects several billion light years away from Earth.

Lesson by Yuan-Sen Ting, animation by TED-Ed.



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As machines take on more jobs, many find themselves out of work or with raises indefinitely postponed. Is this the end of growth? No, says Erik Brynjolfsson -- it's simply the growing pains of a radically reorganized economy. A riveting case for why big innovations are ahead of us ... if we think of computers as our teammates. Be sure to watch the opposing viewpoint from Robert Gordon.

Uploaded 30-08-13

Talk by Erik Brynjolfsson.



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Uploaded 17-11-20

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After many adventures in Wonderland, Alice has once again found herself in the court of the temperamental Queen of Hearts. She’s about to pass through the garden undetected, when she overhears the king and queen arguing that 64 is the same as 65. Can Alice prove the queen wrong and escape unscathed? Alex Gendler shows how.

Lesson by Alex Gendler, directed by Artrake Studio.

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Thank you so much to our patrons for your support! Without you this video would not be possible! Coenraad Keuning, Arjay Arcinue Dineros, 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, Andrea Gordon, denison martins fernandes, Doug Henry, Arlene Spiegelman, Michał Friedrich, Joshua Wasniewski, Maryam Dadkhah, Kristiyan Bonev, Keven Webb, Mihai Sandu, Deepak Iyer, Javid Gozalov, Luke Pisano, Emilia Alvarado, Jaime Arriola, Mirzat Tulafu and Lewis Westbury.



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Explore how alcohol interacts with your brain, and how it can interrupt the brain’s memory networks, leading to blackouts.

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Alcohol has been shown to have strange and selective effects on the brain. Many intoxicated people can perform complex tasks like holding a detailed conversation or navigating a walk home. Yet for those experiencing a blackout, the memory of these events is quickly forgotten. So, how does alcohol cause these memory lapses? Shannon Odell explores how ethanol interrupts the brain’s processes.

Lesson by Shannon Odell, directed by Anton Bogaty.

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View full lesson: https://ed.ted.com/lessons/how-does-alcohol-cause-blackouts-shannon-odell
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Uploaded 03-03-20

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The night before the Death Race across the Wastelands is set to begin, your uncle, the great inventor Slate Kanoli, got kidnapped by the ruthless No-Side gang. The only way to get him back is to race his Coil Runner against the gang yourself. Win and they’ll give back your uncle. Lose and you’ll forfeit the Coil Runner and all his other creations. Can you win the race? Alex Gendler shows how.

Lesson by Alex Gendler, directed by Artrake Studio.

Animator's website: https://www.artrake.com
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View full lesson: https://ed.ted.com/lessons/can-you-solve-the-death-race-riddle-alex-gendler

Thank you so much to our patrons for your support! Without you this video would not be possible! 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, Joshua Wasniewski, Maryam Dadkhah, Kristiyan Bonev, Keven Webb, Mihai Sandu, Deepak Iyer, Javid Gozalov, Emilia Alvarado, Jaime Arriola, Mirzat Tulafu and Lewis Westbury.



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Do you have a right to a healthy planet? Dig into the movement to hold governments accountable for climate change inaction.

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Since 2015, an unprecedented movement has been sweeping courts around the world. Groups of young plaintiffs are suing their governments for their inaction on tackling climate change. These suits argue that climate inaction violates their basic human rights. But what do human rights have to do with the environment? Shannon Odell examines our right to a healthy environment, food, health, and water.

Lesson by Shannon Odell, directed by Lorenzo Mercanti, AIM Creative Studios.

This video was made possible with support from the Open Society Foundations. To learn more about human rights visit: https://ed.ted.com/knowyourrights

Learn more about how TED-Ed partnerships work: https://bit.ly/TEDEdPartner

A special thanks to John Knox who provided information and insights for the development of this video.

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Discover how mRNA vaccines help your immune system fight viral infections and how this decades-old technology was used to create COVID-19 vaccines.

Uploaded 17-08-21

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In the 20th century, most vaccines took over a decade to research, test, and produce. But the vaccines for COVID-19 were cleared for emergency use in less than 11 months. The secret behind this speed is a medical technology that’s been developing for decades: the mRNA vaccine. So how do these revolutionary vaccines work? Kaitlyn Sadtler and Elizabeth Wayne dig into the science of mRNA technology.

Lesson by Kaitlyn Sadtler and Elizabeth Wayne, directed by Igor Ćorić, Artrake Studio.

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