http://primereaders.co.kr/bbs/board.php?bo_table=Ted ko Ted talk (2026-08-11 15:01:10) http://primereaders.co.kr/bbs/board.php?bo_table=Ted&wr_id=2404 https://brilliant.org/TedEd

--

To coincide with the 1964 Tokyo Olympics, Japan launched a groundbreaking bullet train that inspired countries around the world to invest in high-speed rail. Today, high-speed trains regularly travel at over 300 km/h, on par with the take-off speed of a commercial airplane. But can it ever be faster than flying? Ning Zhao details the possibilities and hurdles facing high-speed rail transit.

Lesson by Ning Zhao, directed by Vicente Numpaque, Dr3i Studio, Hernando Bahamon, Globizco Studios.

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After hours of delay, your flight is finally boarding. But as the line grinds to a halt, you can’t help but think — there must be a faster way to board this plane. Mathematicians have been studying this problem for years, devising and testing a range of different boarding methods. Rachel Yang digs into our biggest plane-loading bottlenecks and potential methods to alleviate this travel headache.

Lesson by Rachel Yang, directed by Avi Ofer.

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Spices are often far pricier proportionately than the foods they flavor. But one’s cost has long topped them all. Saffron’s red threads regularly run at rates of over 600 USD an ounce. So what is this so-called “red gold,” and what makes it so expensive? Carolyn Beans digs into the unique biology of saffron and humanity's enduring obsession with the spice.

Lesson by Carolyn Beans, directed by Sarah Saidan.

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Like any other plant, kelps require light to grow. Yet kelps found nearly 90 meters below the ocean's surface, where sometimes only 0.1% of sunlight can reach, grow as large as, and often even larger than, their shallow counterparts. So how have these large, light-dependent organisms adapted to thrive at such depths? Luka Seamus Wright and Salomé Buglass explore the ocean's hidden forests.

Lesson by Luka Seamus Wright and Salomé Buglass, directed by Upamanyu Bhattacharyya, Otter Studios.

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Passports are not the first form of travel documents: in Ancient Egypt, travelers carried “letters of safe conduct” issued by rulers; in Han China and Tudor England, foreigners were issued travel passes. However, for much of human history, borders have been relatively fluid, and travel lacked bureaucratic requirements. So, what changed? Kristin Surak details the history of the passport system.

Lesson by Kristin Surak, directed by Tomás Pichardo-Espaillat.

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For over 25 years, the International Space Station’s air supply systems have revolutionized space missions. Yet the need for regular maintenance, repairs, and upgrades has pushed engineers to develop even more reliable systems for future spacecraft. How do we create breathable air in space? And what does that look like for longer expeditions? Alvaro Romero-Calvo and Theo St Francis investigate.

Lesson by Alvaro Romero-Calvo and Theo St Francis, directed by Lazy Chief.

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The diverse fungal kingdom, which includes everything from baker’s yeast to edible mushrooms to foot infections, has long defied assumptions. Scientists estimate that somewhere between 2 and 12 million species of fungi remain undiscovered— either because they’re microscopic, live hidden within other species, or for other unknown reasons. Max G. Levy digs into the vast and wild world of fungi.

Lesson by Max G. Levy, directed by Petya Zlateva, Compote Collective.

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Losing a loved one can be one of the most traumatic experiences of a person’s life. Grief brings on a whole host of strong emotions that impact both our mental and physical health. But is it possible for these powerful feelings to endanger your life? In other words, can you actually die from a broken heart? Roni Shanoada explores how traumatic events can affect your body.

Lesson by Roni Shanoada, directed by Joana Sus, NOMINT.

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Avalanches are the rapid descent of snow, ice, rock, or a combination of these down a slope. They can be destructive natural disasters and personal tragedies: killing an average of 27 people annually in the US. These alpine nightmares don’t just awaken out of nowhere; they need three specific conditions. So, what causes an avalanche? And is there any way to survive? Simon Trautman investigates.

Lesson by Simon Trautman, directed by Denys Spolitak.

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After years of hosting lavish dinner parties and watching her dishware get chipped during handwashing, American socialite Josephine Cochrane was convinced the world needed a better way to clean dishes. So, she built a prototype for a dishwashing contraption. And the design would become the model for our modern dishwashers. So, how do they work? Rachel Yang takes a look inside the machine.

Lesson by Rachel Yang, directed by Aaron Augenblick, Augenblick Studios.

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--

Medieval European castles weren’t just for passive defense and withstanding enemy onslaughts; they were symbols of power, private residences, and hubs of governance. Castles regularly served as bases for launching attacks and as a way to control local populations. So, how were these formidable fortresses built? Connor C. Wilson explores how the design of these structures evolved over time.

Lesson by Connor C. Wilson, directed by Layron DeJarnette.

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--

Deep in the jungles of southeast Asia lurks a deadly creature with sharp teeth and a venomous bite. But it’s not a snake. It’s a slow loris, the only venomous primate, and one of only a few venomous mammals. Despite their wide-eyed looks, their story is much fiercer than many might imagine. Stephanie A. Poindexter dives into this complex creature’s surprising characteristics.

Lesson by Stephanie A. Poindexter, directed by Reza Riahi.

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Thank you so much to our patrons for your support! Without you this video would not be possible! Mac Hyney, Keith Ellison, robin valero walters, Lynne Truesdale, Gatsby Dkdc, Matthew Neal, Denis Chon, Julian Oberhofer, Monte Carroll, Eddy, 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, and Dennis.]]> 원장 2026-06-11T15:00:13+09:00 http://primereaders.co.kr/bbs/board.php?bo_table=Ted&wr_id=2392
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Sumo wrestling is known across the world as a beloved form of entertainment, a grand display of strength, and an ode to Japan's ancient past and traditions. But surprisingly, many of these so-called "ancient" traditions were actually recent inventions. So, what were these fabricated practices, and how do they relate to sumo’s true history? Lee Thompson traces the evolution of the sport.

Lesson by Lee Thompson, directed by Masayoshi Nakamura, Good General.

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Of the many bewildering behaviors cats display, one of the strangest is their obsession with a specific species of plant. After just one whiff, even the most stoic cat can start pawing, drooling, biting, and wriggling in a state of pure feline euphoria. So, why do cats go crazy for catnip? Jaap de Roode shares the fascinating reason why this herb sends our feline friends into a frenzy.

Lesson by Jaap de Roode, directed by Héloïse Dorsan-Rachet.

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An evil stepmother demands a maiden’s lungs and liver; a girl is ripped from a wolf’s stomach; and sisters mutilate their feet to squeeze into a gold slipper. During the early 1800s, brothers Jacob and Wilhelm Grimm gathered these unflinchingly gory details from stories circulating around what’s now Germany. Claudia Schwabe explores how these now-infamous tales evolved as they spread worldwide.

Lesson by Claudia Schwabe, directed by Skirmanta Jakaitė.

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Music: https://www.workplaywork.com
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Thank you so much to our patrons for your support! Without you this video would not be possible! Clarence E. Harper Jr., Vignan Velivela, Ana Maria, Exal Enrique Cisneros Tuch, Tejas Dc, Khalifa Alhulail, Martin Stephen, Jose Henrique Leopoldo e Silva, Mandeep Singh, Abhijit Kiran Valluri, Morgan Williams, Devin Harris, Pavel Zalevskiy, Karen Goepen-Wee, Filip Dabrowski, Barbara Smalley, Megan Douglas, Tim Leistikow, Ka-Hei Law, Hiroshi Uchiyama, Mark Morris, Misaki Sato, EdoKun, SookKwan Loong, Bev Millar, Lex Azevedo, Michael Aquilina, Jason A Saslow, Yansong Li, Cristóbal Moenne, Dawn Jordan, Prasanth Mathialagan, Samuel Doerle, David Rosario, Dominik Kugelmann - they-them, Siamak Hajizadeh, Ryohky Araya, Mayank Kaul, Christophe Dessalles, Heather Slater, Sandra Tersluisen, Zhexi Shan, Bárbara Nazaré, Andrea Feliz, Victor E Karhel, Sydney Evans, Latora, Noel Situ, emily lam, and Sid.]]> 원장 2026-06-02T15:00:47+09:00