TED-Ed

We think of space as a silent place. But physicist Janna Levin says the universe has a soundtrack -- a sonic composition that records some of the most dramatic events in outer space. (Black holes, for instance, bang on spacetime like a drum.) An accessible and mind-expanding soundwalk through the universe.

Talk by Janna Levin.

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View full lesson: http://ed.ted.com/lessons/the-pattern-behind-self-deception-michael-shermer

Michael Shermer says the human tendency to believe strange things -- from alien abductions to dowsing rods -- boils down to two of the brain's most basic, hard-wired survival skills. He explains what they are and how they get us into trouble.

Talk by Michael Shermer.

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View full lesson: http://ed.ted.com/lessons/let-s-use-video-to-reinvent-education-salman-khan

Salman Khan talks about how and why he created the remarkable Khan Academy, a carefully structured series of educational videos offering complete curricula in math and, now, other subjects. He shows the power of interactive exercises and calls for teachers to consider flipping the traditional classroom script -- give students video lectures to watch at home and do "homework" in the classroom with the teacher available to help.

Talk by Salman Khan.

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With humor and persistence, filmmaker Morgan Spurlock dives into the hidden but influential world of brand marketing on his quest to make a completely sponsored film about sponsorship. (And yes, onstage naming rights for this talk were sponsored too. By whom and for how much? He'll tell you.)

Talk by Morgan Spurlock.

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Get informed on the causes and risks of human papillomavirus, HPV, and how to protect yourself from the infection.

Uploaded 09-07-19

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At some point, most sexually active people will be infected with human papillomavirus, or HPV. There are over 100 types of HPV, and most of the time the body eliminates infections without symptoms— but some strains can pose serious health risks down the line. How can you protect yourself from HPV? Emma Bryce explains how the virus causes harm, who’s at risk and how to minimize those risks.

Lesson by Emma Bryce, directed by Sharon Colman.

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View full lesson: https://ed.ted.com/lessons/what-is-hpv-and-how-can-you-protect-yourself-from-it-emma-bryce

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Physiatrist and engineer Todd Kuiken is building a prosthetic arm that connects with the human nervous system -- improving motion, control and even feeling. Onstage, patient Amanda Kitts helps demonstrate this next-gen robotic arm.

Uploaded 09-08-13

Talk by Todd Kuiken.



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Discover the techniques opera singers use to project their voices over the orchestra and the importance of a singer’s squillo.

Uploaded 09-03-20

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An orchestra fills an opera house with music, but a singer’s voice soars above the instruments. Its melody rings out across thousands of patrons— all without any assistance from a microphone. How is it possible that a single voice can be heard so clearly? The answer lies in the physics of the human voice. Ming Luke explains the carefully honed technique of an expert opera singer.

Lesson by Ming Luke, directed by Franz Palomares.

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View full lesson: https://ed.ted.com/lessons/what-s-a-squillo-and-why-do-opera-singers-need-it-ming-luke

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View full lesson: http://ed.ted.com/lessons/beware-online-filter-bubbles-eli-pariser

As web companies strive to tailor their services (including news and search results) to our personal tastes, there's a dangerous unintended consequence: We get trapped in a "filter bubble" and don't get exposed to information that could challenge or broaden our worldview. Eli Pariser argues powerfully that this will ultimately prove to be bad for us and bad for democracy.

Talk by Eli Pariser.

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Explore the phenomenon and uses of chlorophyll fluorescence, a small amount of light emitted by plants during photosynthesis.

Uploaded 14-09-21

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In 2009, a satellite circled Earth, scanning and sorting the wavelengths reflecting off the planet’s surface. Researchers noticed something baffling: an unexpected wavelength of unknown origin. They tried looking at Earth with only this wavelength, and saw the planet covered in a red hue of varying intensity. So, what was going on? Zoe Pierrat explores the science of chlorophyll fluorescence.

Lesson by Zoe Pierrat, directed by Denis Chapon, The Animation Workshop.

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View full lesson: https://ed.ted.com/lessons/earth-s-mysterious-red-glow-explained-zoe-pierrat
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View full lesson: http://ed.ted.com/lessons/why-do-some-people-go-bald-sarthak-sinha

Uploaded 02-10-14

If you are a living, breathing human being, chances are you have felt sad at least a few times in your life. But what exactly is melancholy, and what (if anything) should we do about it? Courtney Stephens details our still-evolving understanding of sadness -- and even makes a case for its usefulness.

Lesson by Courtney Stephens, animation by Sharon Colman Graham.



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