TED-Ed

Why is 'x' the symbol for an unknown? In this short and funny talk, Terry Moore gives the surprising answer.

Talk by Terry Moore.

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Explore the biological and psychological factors that influence how we experience pain and how our nervous system reactions to harmful stimuli.

Uploaded 20-05-19

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In 1995, the British Medical Journal published a report about a builder who accidentally jumped onto a nail, which pierced straight through his steel-toed boot. He was in such agonizing pain that any movement was unbearable. But when the doctors took off his boot, they discovered that the nail had never touched his foot at all. What’s going on? Joshua W. Pate investigates the experience of pain.

Lesson by Joshua W. Pate, directed by Artrake Studio.

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View full lesson: https://ed.ted.com/lessons/the-mysterious-science-of-pain-joshua-w-pate

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View full lesson here: http://ed.ted.com/lessons/einstein-s-miracle-year-larry-lagerstrom

Uploaded 06-01-15

As the year 1905 began, Albert Einstein faced life as a “failed” academic. Yet within the next twelve months, he would publish four extraordinary papers, each on a different topic, that were destined to radically transform our understanding of the universe. Larry Lagerstrom details these four groundbreaking papers.

Lesson by Larry Lagerstrom, animation by Oxbow Creative.



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Explore the British policy called Operation Legacy, where the government hid incriminating documents from its former colonies.

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In 2009, five Kenyan people took a petition to the British Prime Minister. They claimed they endured human rights abuses in the 1950s, while Kenya was under British colonial rule, and demanded reparations. They had no documentary evidence that Britain sanctioned systems of torture— but thousands of secret files were waiting to be discovered. Audra Diptée digs into the Operation Legacy documents.

Lesson by Audra A. Diptée, directed by Hernando Bahamon.

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View full lesson: https://ed.ted.com/lessons/why-did-the-british-empire-burn-sink-and-hide-these-documents-audra-a-diptee
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Animator's website: https://www.ted.com/profiles/5461461/about
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View full lesson: http://ed.ted.com/lessons/the-moral-dangers-of-non-lethal-weapons-stephen-coleman

Uploaded 14-07-13

Pepper spray and tasers are in increasing use by both police and military, and more exotic non-lethal weapons such as heat rays are in the works. In this talk, ethicist Stephen Coleman explores the unexpected consequences of their introduction and asks some challenging questions. (Filmed at TEDxCanberra.)

Talk by Stephen Coleman.



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View full lesson: http://ed.ted.com/lessons/a-host-of-heroes-april-gudenrath

What can some of literature's most famous heroes teach us? From the epic hero (like Beowulf) to the tragic hero (like Oedipus), each has something distinctive to share. April Gudenrath describes the many faces of the fictional hero -- and shows how they can inspire everyday people.

Lesson by April Gudenrath, animation by Buzzco Associates, inc.

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Join siblings Hisham and Asma in medieval Baghdad as they prepare and gather supplies for the hajj, a holy pilgrimage to Mecca.

Uploaded 21-03-23

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It’s 791 CE. As the morning sun shines on the Golden Gate Palace, brother and sister Hisham and Asma prepare for the journey of a lifetime: the hajj, a holy pilgrimage to Mecca. They intend to travel with the big hajj caravan— but a last-minute mishap threatens to undo months of careful planning. Birte Kristiansen and Petra Sijpesteijn detail a day in the life of siblings in medieval Baghdad.

Lesson by Birte Kristiansen and Petra Sijpesteijn, directed by Mohammad Babakoohi.

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Uploaded 21-08-18

View full lesson: https://ed.ted.com/lessons/why-is-aristophanes-called-the-father-of-comedy-mark-robinson

Aristophanes, often referred to as the Father of Comedy, wrote the world’s earliest surviving comic dramas. They're stuffed full of parodies, songs, sexual jokes and surreal fantasy -- and they’ve shaped how comedy’s been written and performed ever since. Mark Robinson shares a brief history of Aristophanes.

Lesson by Mark Robinson, directed by Anton Bogaty.

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Dig into the science of fecal microbial transplantation, where doctors transfer feces into a patient to help reset their gut microbiome.

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1,700 years ago, Chinese alchemist Ge Hong was renowned for his soup that could cure diarrhea-stricken patients. It had a surprising secret ingredient: feces. While it might seem unwise to consume feces, exciting new research suggests that taking poop into the body in other ways might benefit our health. Kathryn M. Stephenson & David L. Suskind share the science of fecal microbial transplantation.

Lesson by Kathryn M. Stephenson and David L. Suskind, directed by Luisa Holanda.

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Thank you so much to our patrons for your support! Without you this video would not be possible! Jay M, Constantino Victor Delgado, Andrea Galvagni, Andrew Tweddle, Laurel-Ann Rice, Fernando A. Endo, Helen Lee, pam morgan, sarim haq, Gerardo Castro, Michel-Ange Hortegat, Enes Kirimi, Amaury BISIAUX, ND, Samyogita Hardikar, Vanessa Graulich, Vandana Gunwani, Abdulmohsin Almadi, AJ Lyon, Geoffrey Bultitude, Mi Mi, Thomas Rothert, Brian Elieson, Oge O, Weronika Falkowska, Nevin Spoljaric, Sid Chanpuriya, Anoop Varghese, David Yastremski, Noah Webb, Roberto Chena, Oliver Koo, Luke Pisano, Andrea Gordon, Aleksandar Donev, Nicole Klau Ibarra, Jesse Lira, Ezekiel Raui, Petr Vacek, Dennis, Olivia Fu, Kari Teffeau, Cindy Lai, Rajath Durgada Manjunath, Dan Nguyen, Chin Beng Tan, Tom Boman, Karen Warner, Iryna Panasiuk and Aaron Torres.

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View full lesson: http://ed.ted.com/lessons/how-do-you-know-whom-to-trust-ram-neta

We believe a lot of things because we've been told - from our personal acquaintances and also experts. With so many belief systems being passed to us, how do we know whom to trust? Using contemporary examples, Ram Neta explains when listening to experts is a good idea...and when it's not.

Lesson by Ram Neta, animation by Colleen Cox.

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