TED-Ed

View full lesson: http://ed.ted.com/lessons/what-causes-bad-breath-mel-rosenberg

Uploaded 31-03-15

Halitosis is a curse that has plagued humanity since ancient times. But what causes it, and why is it so universally terrifying? Mel Rosenberg outlines the basics of bad breath — and what you can do when it strikes you.

Lesson by Mel Rosenberg, animation by Andrew Foerster.



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Inspired by an abalone shell, Angela Belcher programs viruses to make elegant nanoscale structures that humans can use. Selecting for high-performing genes through directed evolution, she's produced viruses that can construct powerful new batteries, clean hydrogen fuels and record-breaking solar cells. In her talk, she shows us how it's done. (Filmed at TEDxCaltech.)

Uploaded 15-08-13

Talk by Angela Belcher.



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Explore the science of what causes total solar eclipses, and find out how civilizations throughout history reacted to them.

Uploaded 22-07-13

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How can the shadow of the tiny moon eclipse the sight of the gargantuan sun? By sheer coincidence, the disc of the sun is 400x larger than the disc of the moon, but it's 390x farther from Earth -- which means that when they align just right, the moon blocks all but the sun's glowing corona. Andy Cohen details this extraordinary celestial phenomenon (and when it will next occur).

Lesson by Andy Cohen, animation by Bevan Lynch.

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View full lesson: http://ed.ted.com/lessons/what-creates-a-total-solar-eclipse-andy-cohen
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Trace the rise and fall of the Islamic Empire, from the prophet Muhammad in the 7th century to the sacking of Baghdad.

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In the 7th century CE, the prophet Muhammad united the people of the Arabian Peninsula through the formation of Islam. Over the next 30 years, caliphs conquered vast areas beyond Arabia, including their mighty neighbors the Persians and Byzantines. But an empire this vast was at risk of conflict and fracture. Petra Sijpesteijn and Birte Kristiansen detail the rise and fall of the Islamic Empire.

Lesson by Petra Sijpesteijn & Birte Kristiansen, directed by Elahe Baloochi, Fardi Mahmoodi.

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View full lesson: https://ed.ted.com/lessons/the-rise-and-fall-of-the-medieval-islamic-empire-petra-sijpesteijn-birte-kristiansen
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Discover the extraordinary capabilities of hagfish, the slime-producing fish that has survived on Earth for over 300 million years.

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In 2017, a truck screeched to a halt. One of its containers slid off, hit a car, and spilled its contents— thousands of kilograms of hagfish. The result of this accident was an absolute mess: the highway was coated in a thick slime that took the fire department 7 hours to clear. How did these creatures create this stupendous supply of slime? Noah R. Bressman and Douglas Fudge investigate.

Lesson by Noah R. Bressman and Douglas Fudge, directed by Denys Spolitak.

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View full lesson: https://ed.ted.com/lessons/the-world-s-slimiest-animal-noah-r-bressman-and-douglas-fudge
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Animator's website: https://vimeo.com/user50965180
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Practice more problem-solving at https://brilliant.org/TedEd/

Uploaded 01-09-20

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It’s your first day at Magnificent Marigold’s Magical Macademy. But before you can learn your first spell you must get through the sorting ceremony. And the sorting hat has chosen you for a special challenge. The Macademy had 8 founders who established four houses, and there was once a mysterious fifth house. Can you figure out who founded what? Dan Katz and Alex Rosenthal show how.

Lesson by Dan Katz and Alex Rosenthal, 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-sorting-hat-riddle-dan-katz-and-alex-rosenthal

Thank you so much to our patrons for your support! Without you this video would not be possible! 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, Lewis Westbury, Felipe Hoff, Rebecca Reineke, Cyrus Garay, Victoria Veretilo, Michael Aquilina, William Biersdorf, Patricia Alves Panagides, Valeria Sloan Vasquez, Mike Azarkman, Yvette Mocete, Pavel Maksimov, Victoria Soler-Roig, Betsy Feathers, Samuel Barbas, Therapist Gus, Sai Krishna Koyoda, Elizabeth Parker, William Bravante, Irindany Sandoval, Mark wisdom, Brighteagle, Beatriz Inácio, Mighterbump, Pamela Harrison, Maija Chapman, Liana Switzer, Curtis Light, The Brock, Dianne Palomar and Edgar Campos Barrachina.



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Discover what colors are the most rare to see in nature, and how physics and evolution drive their scarcity.

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Plants, animals, or minerals found in nature bear almost every color imaginable. There are two factors that influence what hues you see in the wild: physics and evolution. So, which colors are you least likely to see in the natural world? Victoria Hwang explores one of nature’s rarest spectacles.

Lesson by Victoria Hwang, directed by Tamara Bogovac, Artrake Studio.

2:33 - Image referenced from paper by Eric R. Dufresne, Heeso Noh, Vinodkumar Saranathan, Simon G. J. Mochrie, Hui Cao and Richard O. Prum, photograph of Plum-throated Cotinga (Cotinga maynana) by Thomas Valqui, https://rsc.li/3xyhxGu

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View full lesson: http://ed.ted.com/lessons/a-new-way-to-diagnose-autism-ami-klin

Early diagnosis of autism spectrum disorder can improve the lives of everyone affected, but the complex network of causes make it incredibly difficult to predict. At TEDxPeachtree, Ami Klin describes a new early detection method that uses eye-tracking technologies to gauge babies' social engagement skills and reliably measure their risk of developing autism. (Filmed at TEDxPeachTree.)

Talk by Ami Klin.

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Venus fly traps, bladderworts and sundews, oh my! Learn about carnivorous plants and their predatory antics to lure, trap and digest prey.

Uploaded 11-04-19

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Around the world there are more than 600 plant species that supplement a regular diet of sunlight, water and soil with insects, frogs and even rats. Flies, tadpoles and beetles fall prey to the remarkable, predatory antics of carnivorous plants. What exactly are carnivorous plants and how do they trap their prey? Kenny Coogan dives into the world of these flesh-eating tricksters.

Lesson by Kenny Coogan, directed by Lisa LaBracio.

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View full lesson: https://ed.ted.com/lessons/the-wild-world-of-flesh-eating-plants-kenny-coogan

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Learn more about TED-Ed Clubs here: https://ed.ted.com/clubs

Uploaded 10-05-18

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View full lesson: https://ed.ted.com/lessons/when-will-the-next-ice-age-happen-lorraine-lisiecki

Throughout Earth’s history, climate has varied greatly. For hundreds of millions of years, the planet had no polar ice caps. Without this ice, the sea level was 70 meters higher. At the other extreme, about 700 million years ago, Earth became almost entirely covered in ice, during an event known as “Snowball Earth.” What causes these swings in the planet’s climate? Lorraine Lisiecki investigates.

Lesson by Lorraine Lisiecki, animation by CUB Animation.

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