TED-Ed

What controls aging? Biochemist Cynthia Kenyon has found a simple genetic mutation that can double the lifespan of a simple worm, C. elegans. The lessons from that discovery, and others, are pointing to how we might one day significantly extend youthful human life.

Talk by Cynthia Kenyon.

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View full lesson: http://ed.ted.com/lessons/the-infinite-life-of-pi-reynaldo-lopes

The ratio of a circle's circumference to its diameter is always the same: 3.14159... and on and on (literally!) forever. This irrational number, pi, has an infinite number of digits, so we'll never figure out its exact value no matter how close we seem to get. Reynaldo Lopes explains pi's vast applications to the study of music, financial models, and even the density of the universe.

Lesson by Reynaldo Lopes, animation by Igor Coric.

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Explore the data analysis method known as p-hacking, where data is misrepresented as statistically significant.

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In 2011, a group of researchers conducted a study designed to find an impossible result. Their study involved real people, truthfully reported data, and commonplace statistical analyses. So how did they do it? The answer lies in a statistical method scientists often use to try to figure out whether their results mean something, or if they’re random noise. James A. Smith explores p-hacking.

Lesson by James A. Smith, directed by Anton Bogaty.

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View full lesson: https://ed.ted.com/lessons/the-method-that-can-prove-almost-anything-james-a-smith
Dig deeper with additional resources: https://ed.ted.com/lessons/the-method-that-can-prove-almost-anything-james-a-smith#digdeeper

Animator's website: https://www.instagram.com/anton_bogaty
Music: https://www.campstudio.co
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View full lesson: http://ed.ted.com/lessons/want-to-be-happier-stay-in-the-moment-matt-killingsworth

When are humans most happy? To gather data on this question, Matt Killingsworth built an app, Track Your Happiness, that let people report their feelings in real time. Among the surprising results: We're often happiest when we're lost in the moment. And the flip side: The more our mind wanders, the less happy we can be. (Filmed at TEDxCambridge.)

Talk by Matt Killingsworth.

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View full lesson: http://ed.ted.com/lessons/the-mystery-of-chronic-pain-elliot-krane

We think of pain as a symptom, but there are cases where the nervous system develops feedback loops and pain becomes a terrifying disease in itself. Starting with the story of a girl whose sprained wrist turned into a nightmare, Elliot Krane talks about the complex mystery of chronic pain and reviews the facts we're just learning about how it works and how to treat it.

Talk by Elliot Krane.

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Explore how Dutch and British colonization of South Africa led to Apartheid, the strict national policy of racial segregation.

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For 46 years, South Africans lived under Apartheid, a strict policy of segregation that barred the country’s Black majority from skilled, high-paying jobs, quality education, voting, and much more. So, how did these laws come to be? And how did this era of institutionalized discrimination finally come to an end? Thula Simpson explores how colonization led to the national trauma of Apartheid.

Lesson by Thula Simpson, directed by Aya Marzouk, Giraffics.

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View full lesson: https://ed.ted.com/lessons/how-did-apartheid-happen-and-how-did-it-finally-end-thula-simpson
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Animator's website: https://ayamarzouk.com & https://www.giraffics.com
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Download the Audible Original podcast “Moriarty: The Silent Order” and support TED-Ed's nonprofit mission: https://www.audible.com/ted-ed

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One day in the fall, you called upon your friend, Sherlock Holmes, and found him in conversation with Jabez Wilson. Wilson had been working for the mysterious League of Red-Headed Men. Today, he arrived at work to find the group had disappeared, and now turns to Holmes to make sense of the events. Follow the detective and see if you can solve this adaptation of one of Sherlock’s most famous cases.

Lesson by Alex Rosenthal, directed by Skirmanta Jakaitė, Art Shot.

This video made possible in collaboration with Audible
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View full lesson: https://ed.ted.com/lessons/sherlock-holmes-and-the-case-of-the-red-headed-league-alex-rosenthal
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View full lesson: http://ed.ted.com/lessons/building-the-seed-cathedral-thomas-heatherwick

A future more beautiful? Architect Thomas Heatherwick shows five recent projects featuring ingenious bio-inspired designs. Some are remakes of the ordinary: a bus, a bridge, a power station ... And one is an extraordinary pavilion, the Seed Cathedral, a celebration of growth and light.

Talk by Thomas Heatherwick.

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How do fast-paced video games affect the brain? Step into the lab with cognitive researcher Daphne Bavelier to hear surprising news about how video games, even action-packed shooter games, can help us learn, focus and, fascinatingly, multitask. (Filmed at TEDxCHUV.)

Talk by Daphne Bavelier.

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Discover what happens in your body when you have a fever and why its role in our immune response remains a mystery to scientists.

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There are many mysteries around fever, but we do know that all mammals, some birds and even a few invertebrate and plant species feel fever’s heat. It has persisted for over 600 million years of evolution. But it has a significant cost: for every degree increase in temperature, there’s a 12.5% increase in energy required. So, why and how does your body produce a fever? Christian Moro investigates.

Lesson by Christian Moro, directed by Artrake Studio.

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View full lesson: https://ed.ted.com/lessons/why-do-you-get-a-fever-when-you-re-sick-christian-moro
Dig deeper with additional resources: https://ed.ted.com/lessons/why-do-you-get-a-fever-when-you-re-sick-christian-moro#digdeeper

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