TED-Ed

Explore the science of sinkholes, how they commonly form, and what human activities can also trigger them.

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It was a rainy December morning in San Francisco when the Earth opened up. The ground suddenly fell away into a 12-meter-deep sinkhole that engulfed a garage, part of a street, and a multi-million-dollar mansion. Sinkholes can seem to strike out of nowhere, but they’re more common than people often think. So, how do they form? Elise Cutts details what’s happening just below your feet.

Lesson by Elise Cutts, directed by Evandro D'Hipolito.

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View full lesson: https://ed.ted.com/lessons/how-do-sinkholes-form-elise-cutts
Dig deeper with additional resources: https://ed.ted.com/lessons/how-do-sinkholes-form-elise-cutts/digdeeper

Animator's website: https://evandrodhipolito.myportfolio.com
Music: https://www.wonderboyaudio.com
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Most people instinctively avoid conflict, but as Margaret Heffernan shows us, good disagreement is central to progress. She illustrates (sometimes counterintuitively) how the best partners aren't echo chambers -- and how great research teams, relationships and businesses allow people to deeply disagree.

Talk by Margaret Heffernan.

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Can India become a global hub for innovation? Nirmalya Kumar thinks it already has. He details four types of "invisible innovation" currently coming out of India and explains why companies that used to just outsource manufacturing jobs are starting to move top management positions overseas, too. (Filmed at TEDxLondonBusinessSchool.)

Uploaded 21-08-13

Talk by Nirmalya Kumar.



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In a humorous talk with an urgent message, LZ Granderson points out the absurdity in the idea that there's a "gay lifestyle," much less a "gay agenda." (Filmed at TEDxGrandRapids.)

Uploaded 21-08-13

Talk by LZ Granderson.



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View full lesson: http://ed.ted.com/lessons/the-science-of-macaroni-salad-what-s-in-a-mixture-josh-kurz

Uploaded 31-07-13

What's in macaroni salad? Break down the pasta, mayonnaise, vinegar, mustard, vegetables, etc., and you're left with a bunch of molecules. Josh Kurz uses a delicious recipe to exemplify three types of mixtures (solution, colloid and suspension), while reminding us that we're all made of the same stuff.

Lesson and animation by Josh Kurz.



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View full lesson: http://ed.ted.com/lessons/mysteries-of-vernacular-zero-jessica-oreck-and-rachael-teel

Uploaded 01-08-13

Though the first written number system can be dated back to 2500 years ago in Mesopotamia, a zero-like symbol did not appear until 7th century CE India. Jessica Oreck and Rachael Teel track the evolution of zero from a dot to the symbol we use today, as well as the Arabic, Italian and French roots of the word.

Lesson by Jessica Oreck and Rachael Teel, animation by Jessica Oreck.



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Investigate the possibility of scanning the human brain and uploading our minds and consciousness to a digital world.

Uploaded 28-10-19

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Imagine a future where nobody dies— instead, our minds are uploaded to a digital world. There they could live on in a realistic, simulated environment with avatar bodies, calling in and contributing to the biological world. Mind-uploading has powerful appeal— but what would it actually take to scan a person’s brain and upload their mind? Michael S. A. Graziano explores the challenges.

Lesson by Michael S. A. Graziano, directed by Lobster Studio.

Animator's website: https://www.lobsterstudio.tv
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View full lesson: https://ed.ted.com/lessons/how-close-are-we-to-uploading-our-minds-michael-s-a-graziano

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View full lesson: http://ed.ted.com/lessons/making-sense-of-spelling-gina-cooke

What can spelling tell us about relationships between words? While spelling may sometimes seem random or unexpected, this lesson illuminates how peeling back the layers of spelling helps us understand the complex history and meaningful structure of words.

Lesson by Gina Cooke, animation by The Leading Sheep (http://www.theleadingsheep.com).

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View full lesson: http://ed.ted.com/lessons/what-gives-a-dollar-bill-its-value-doug-levinson

Uploaded 23-06-14

The value of money is determined by how much (or how little) of it is in circulation. But who makes that decision, and how does their choice affect the economy at large? Doug Levinson takes a trip into the United States Federal Reserve, examining how the people who work there aim to balance the value of the dollar to prevent inflation or deflation.

Lesson by Doug Levinson, animation by Qa'ed Mai.



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Explore the science of bone lengthening surgery, and discover the benefits and limitations of this still-developing technology.

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Differences in leg length can emerge for various reasons, from genetic and hormonal conditions to injuries that impact bone growth. But while we still don’t know exactly what degree of difference causes health issues, doctors have made great strides in figuring out how to even out these mismatched limbs. Jason Shih Hoellwarth digs into the benefits and limitations of bone lengthening surgery.

Lesson by Jason Shih Hoellwarth, directed by Igor Ćorić, Artrake Studio.

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View full lesson: https://ed.ted.com/lessons/what-if-one-of-your-legs-was-shorter-than-the-other-jason-shih-hoellwarth
Dig deeper with additional resources: https://ed.ted.com/lessons/what-if-one-of-your-legs-was-shorter-than-the-other-jason-shih-hoellwarth/digdeeper

Animator's website: https://www.artrake.com
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