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This video is about a new stunning visual resolution of a very pretty and important paradox that I stumbled across while I was preparing the last video on logarithms. 00:00 Intro 00:56 Paradox 03:52 Visual sum = ln(2) 07:58 Pi 11:00 Gelfond's number 14:22 Pi exactly 17:35 Riemann's rearrangement theorem 22:40 Thanks! Riemann rearrangement theorem. https://en.wikipedia.org/wiki/Riemann_series_theor
The painter's paradox, a.k.a. Gabriel's horn paradox a.k.a. Torricelli's horn paradox has been done to death on YouTube. So why do it again? Well, being all about some remarkable features of 1/x, this topic nicely complements the previous two videos that were also dedicated to 1/x. Now the first Mathologer trilogy is complete! Also, I thought of a couple of nice twists to make this treatment of th
In today’s video we’ll make a little bit of mathematical history. I'll tell you about a major upgrade of one of Archimedes' greatest discoveries about the good old sphere that so far only a handful of mathematicians know about. 00:00 Intro to the baggage carousel 01:04 Archimedes baggage carousel 04:26 Inside-out animations 04:59 Inside-out discussion 10:38 Inside-out paraboloid 12:43 Ratio 3:2 13
Second coop with Andrew. This time it's about the Schwarz lantern a very famous counterexample to something that mathematicians believed to be obviously true. A 3D cousin of the famous pi = 4 paradox. 00:00 Intro 00:39 Troll math: the pi=4 meme 02:25 Archimedes chops off corners 05:51 Archimedes boxing of pi 07:40 Schwarz lantern 16:59 Area formula 17:12 Schwarz pi = 4 memes 20:17 Folding flat 21:
Good news! You really can still discover new beautiful maths without being a PhD mathematician. Stumbled across this one while working on the magic squares video. Another curious discovery by recreational mathematician Lee Sallows. A simple and beautiful and curious fact about triangles that, it appears, was first discovered only 10 years ago. Really quite amazing that this one got overlooked, con
Conway's whatever ... it's named after John Conway and so it must be good :) Wiki page dedicated to John Conway https://en.wikipedia.org/wiki/John_Horton_Conway Wiki page Conway's circle https://en.wikipedia.org/wiki/Conway_circle_theorem Wiki page on his Game of Life https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life Michael de Villiers (the connection with the windscreen wiper theorem, read t
Today’s topic is the Petr-Douglas-Neumann theorem. John Harnad told me about this amazing result a couple of weeks ago and I pretty much decided on the spot that this would be the next Mathologer video. I really had a lot of fun bringing this one to life, maybe too much fun :) Very good Wiki page on the Petr–Douglas–Neumann theorem https://en.wikipedia.org/wiki/Petr-Douglas-Neumann_theorem Napoleo
Today's mission: saving another incredible discovery from falling into oblivion: Steinbach's amazing infinite family of counterparts of the golden ratio discovered around 1995. Lot's of my own little discoveries in this one :) 00:00 Intro 05:53 Ptolemy 09:18 Perfect cut 16:01 Golden rectangle 22:03 Fibonacci 33:07 A+B=AB 45:48 Images and music 47:27 Thank you! The slide show for this video is made
We are making history again by presenting a new visual proof of the 2000+ years old Ptolemy's theorem and Ptolemy's inequality. 00:00 Introduction 04:27 Geometry 101 08:19 Applications 14:46 Ptolemy's inequality 18:34 LIES 25:35 Animated proofs 28:57 Thank you! 30:53 Degenerate Easter Egg There are some other proofs of Ptolemy's theorem/inequality based on scaling and aligning suitable triangles.
The third video in a trilogy of Mathologer videos dealing with sum-equals-product identities and equations. The other two are: Way beyond the golden ratio The power of AB=A+B (Mathologer masterclass) https://youtu.be/cCXRUHUgvLI Heron’s formula: What is the hidden meaning of 1 + 2 + 3 = 1 x 2 x 3 ? https://youtu.be/IguNXoCjBEk Today's video is all about how 2+2=2x2 and 1+2+3=1x2x3 first extends to
This is a corrected version of a video that I uploaded two days ago. After a critical mistake was discovered in the "Nature's Numbers" part of the video, I decided to scrap the original video, fix the errors and republish the video (many more hours down the drain :( Anyway, had to be done. Just in case you are wondering my list of best approximations of pi did not fit in with my definition. This w
Today we are solving an ancient bankruptcy puzzle from the Talmud using the principle of communicating vessels. A very nice visual way of making sense of an otherwise tricky problem. "Game theoretic analysis of a bankruptcy problem from the Talmud" by Robert J Aumann and Michael Maschler https://www.sciencedirect.com/science/article/pii/0022053185901024 " ‘Hydraulic’ rationing" by Marek M. Kaminsk
Today’s mission is to reveal a surprisingly simple trick that lets you use any old ax(e) to calculate the area of plane shapes. More broadly, we’ll explore planimeters — mechanical instruments that compute area by tracing a shape’s edge. Real mathematical magic in action! 00:00 Intro (a mathematical fairy tale) 07:16 Cool machines (history and types of planimeters) 09:05 Green's theorem (the most
I’ve been meaning to make this video about building and solving physical 4D Rubik’s cubes ever since Melinda Green sent me one of her brilliant physical 2x2x2x2s back in 2017! Why did it take so long? Well, this one was especially tricky to get right, and I think it’s probably the video that took me the longest to put together. I really hope you like this one :) 00:00 Intro 03:53 Warm-up 08:59 4d
Is there really something new to discover about our good old six-sided die? Well, I just did :) Nothing Earth-shattering and definitely a combo of things we've known for a while, still very neat I think. Let's see whether you agree :) Here is the javascript app that me and my new best coding buddy ChatGPT vibed together for this video. You may have to adjust the width of your browser window to ali
Shari Liu is principal investigator at Johns Hopkins. She studies how we understand other people’s minds and actions, focusing on their origins in development and their origins in the human brain.
Why do we celebrate appearance over ability in sports? Performance scientist Dominique Condo explores why so many elite female athletes — women with Olympic medals, world records and championship trophies — report body image concerns that end up hindering their performance. She offers a series of subtle shifts we can make to help any athlete stay focused on building strength, resilience and confid
Picture this: a rocket ship crash-lands on a planet, and an alien approaches the spacecraft. What do you see in your mind when you visualize this scene? For Alex Rosenthal (and many others), the answer is: absolutely nothing. Exploring the fascinating science of aphantasia, or the inability to generate mental images, he shows why our minds are much more different than we think.
Have you ever left a meeting thinking: everyone talked, but nothing was achieved? Chances are that people were listening to each other, just not in the same way. Listening experts Maegan Stephens and Nicole Lowenbraun unpack the four different ways to listen, sharing a practical framework that could change how you respond, build trust and get results — starting with just one simple question. (Reco
If a company plants trees to offset its pollution, is that climate progress — or is it greenwashing? Critics of carbon markets say it’s the latter. But Sandeep Roy Choudhury, who’s spent two decades financing climate projects from rural cookstoves to coastal forests, says the real failure is discouraging companies from even trying. Hear his case for why we shouldn’t let perfection block meaningful
On Thursday, April 16, join us LIVE from TED2026: All of Us — our flagship annual conference in Vancouver, BC, Canada. Experience a full session of thought-provoking TED Talks and hear from speakers from the TED Idea Search — plus unscripted moments sure to surprise and delight. TED2026 is streaming live from Vancouver! Be one of the first to watch every talk from the full conference, as it happen
The TED Idea Search arrives in Buenos Aires, a city with a fierce intellectual tradition, as 10 speakers deliver talks in a stunning warehouse that’s home to the city's iconic opera sets, competing for a chance to speak on the TED main stage. Watch as a Gen Z voice reframes "brain rot" as a secret diplomatic tool and a surgeon explores the future of robotic medicine, reminding us why the human tou
Where's the best free comedy show in town? Tom Sullam, cofounder of the annual Comedy Wildlife Photography Awards, shares hilarious animal photos that dissolve the distance between humans and nature. The result? A joyful case for caring about what we're at risk of losing.
The universe started with a bang -- but how will it end? With astonishing visuals, cosmologist and TED Fellow Katie Mack takes us to the theoretical end of everything, some trillions of years in the future, in a profound meditation on existence, wonder and the legacy of humanity within the immensity of time and space.
The race to build smarter AI is crashing into a physical limitation: the power grid simply can't keep up with the energy demands of data centers. Computer scientist Ayșe Coskun shows how we could turn this problem on its head, transforming AI facilities into virtual batteries that help stabilize the grid and accelerate clean energy. Learn why the technology causing this crisis might be the only th
In a swaggering performance, choreographer Sean Bankhead and his students perform the viral dance he designed for Victoria Monét's hit song "On My Mama." Rooted in Black culture and inspired by generations of iconic artists, Bankhead blends expertise with at least one move everyone can try — showing how choreography doesn't just reflect culture, it drives it forward. (Recorded at TEDNext 2025 on N
"Autism is not a disease; it's just another way of thinking," says Ethan Lisi. Offering a glimpse into the way he experiences the world, Lisi breaks down misleading stereotypes about autism, shares insights into common behaviors like stimming and masking and promotes a more inclusive understanding of the spectrum.
We've built a legal system that distrusts eyewitness memory — backed by cautionary science and high-profile exonerations. John Wixted, a leading psychology researcher, challenges this conventional wisdom with a counterintuitive finding: the problem might not be memory itself but how (and when) courts test it. (Recorded at TEDxUCSanDiego on May 17, 2025) Join us in person at a TED conference: https
Urging us to turn away from voices perpetuating harmful stereotypes, gender equality advocate Gary Barker shares three insights on fostering a culture of care, compassion and connection among men. "We are the most wired-to-care species on the planet," he says. "But if you don't use it ... you don't get good at it."
Legendary music producer Jermaine Dupri pulls back the curtain on how hit songs really get made in TED’s rapid-fire Q&A format, “On the Spot.” Answering a stream of unexpected questions, he covers what makes a good hook, why he doesn’t chase “cool,” how he helped build Atlanta’s sound and more. (Recorded at TEDNext 2025 on November 10, 2025) Join us in person at a TED conference: https://tedtalks.
She commanded 1,800 ships, led tens of thousands of pirates, and forced an empire to negotiate. This is the story of Zheng Yi Sao, the most powerful pirate in history. From her rise to power to the floating pirate confederation that ruled the South China Sea, we're exploring how one woman reshaped trade, war, and authority in the early 19th century. Nightshift is a new channel by @kurzgesagt . It'
Discover Odoo 👉 https://www.odoo.com/r/xZF You get access to all available applications starting at $24.90/month. Thanks to Odoo for sponsoring this video! Sources & further reading: https://sites.google.com/view/sources-whalefuel/ For centuries, humanity hunted the largest animals that ever lived. Not for food, but for light, machines, and profit. Whale oil powered cities, fueled industrializati
Do you have a balanced news diet? Go to https://ground.news/night to see reporting from a variety of sources and perspectives around the world. Subscribe for 40% off their unlimited access Vantage plan through our link. For 72 years, Louis XIV ruled as the most powerful king in Europe. He centralized power, reshaped the map of Europe, and turned Versailles into a glittering machine of spectacle an
Get the exclusive NordVPN deal + 4 months extra here: https://nordvpn.com/nightshift It's risk-free with Nord’s 30-day money-back guarantee! Sources & further reading: https://sites.google.com/view/sources-gold-rush/ When gold was discovered in California in 1848, hundreds of thousands rushed west in one of the largest migrations in history. But while others chased fortune in the dirt, Samuel Bran
Discover Odoo’s Invoicing app 👉 https://www.odoo.com/r/GKgx You get access to all available apps starting at $24.90/month. Thanks to Odoo for sponsoring this video! Sources & further reading: https://sites.google.com/view/sources-indiaexport/ More than two thousand years ago, one of the deadliest battles in Indian history changed the course of the entire empire. Instead of creating a legacy of co
Use the code NIGHTSHIFT or click on the link https://displate.com/@nightshift to get 26% off for one Displate, 31% off for two, and 36% off for three or more Displates. (Discount excludes Limited Editions.) Sources & further reading: https://sites.google.com/view/sources-opium-wars/ In the 18th century, the British Empire faced a growing demand for Chinese tea, but nothing they offered could convi
Est-ce que je prends ma retraite ? ▀▀▀ Références : https://ve42.co/AnnouncementRefs ▀▀▀ Remerciements particuliers à nos soutiens sur Patreon : Adam Foreman, Albert Wenger, Alex Porter, Alexander Tamas, Anton Ragin, armedtoe, Balkrishna Heroor, Bertrand Serlet, Blake Byers, Bruce, Damien, Dave Kircher, David Johnston, David Tseng, EJ Alexandra, Evgeny Skvortsov, Garrett Mueller, Gnare, gpoly, Hay
Comment fonctionnent les QR codes ? Les motifs en damier qui envahissent le monde, décryptés. Rendez-vous sur https://Saily.com/veritasium et utilisez le code ‘veritasium’ pour bénéficier d’une remise exclusive de 15 % sur votre premier achat. Remerciements particuliers à Mashiro Hara et Yuki Watanabe. 00:00 Je me suis trompé 00:49 Comment le code Morse a révolutionné la communication 03:57 Commen
Les ordinateurs analogiques ont été les ordinateurs les plus puissants pendant des milliers d'années, relégués à l'obscurité par la révolution numérique. Cette vidéo est sponsorisée par Brilliant. Les 200 premières personnes à s'inscrire via https://brilliant.org/veritasium bénéficient de 20% de réduction sur un abonnement annuel. Merci à Scott Wiedemann pour les instructions de l’ordinateur en Le
Cet entrepôt gouvernemental permet à toute notre société de rester conforme aux normes. Une partie de cette vidéo a été sponsorisée par Google Domains. Faites le premier pas pour être en ligne avec un nom de domaine chez Google Domains – rendez-vous sur domains.google/veritasium pour bénéficier de 20 % de réduction sur votre première année. #GoogleDomains 👉 Cette chaîne est réalisée en collaborat
Que se passe-t-il si vous continuez à ralentir le temps ? Sponsorisé par Hostinger - Faites d’aujourd’hui votre premier jour et visitez https://ve42.co/VE10. Utilisez le code VERITASIUM pour une remise supplémentaire. ▀▀▀ 0:00 Comment fonctionne un stroboscope ? 3:28 L’homme qui a arrêté le temps 8:43 Résolution spatiale vs temporelle 13:09 1 billion d’images par seconde 16:56 Regarder la lumière
Saviez-vous que vous êtes une véritable usine à caoutchouc ? Découvrez l’incroyable histoire du caoutchouc, de l’hévéa du Brésil à votre propre foie ! Plongez dans les secrets du latex, des membranes cellulaires et des polymères. Abonnez-vous pour plus de fun scientifique et dites-nous en commentaire ce qui vous aura le plus surpris ! #science #histoire #nature #biologie #curiosité 👉 Cette chaîne
Vous êtes-vous déjà demandé pourquoi les moteurs à réaction ne fondent pas malgré des températures extrêmes ? On lève le voile sur ce mystère brûlant ! Découvrez les secrets fous des pales de turbine, entre métaux résistants et forces titanesques. Abonnez-vous pour ne rien rater et dites-nous en commentaire ce qui vous a le plus bluffé ! #science #technologie #moteur #avion #métal 👉 Cette chaîne
Découvrez comment le caoutchouc naturel a failli ruiner des entreprises et comment l'ingéniosité d'un certain Charles a tout changé ! Entre produits fondus, entrepôts nauséabonds et inventions de génie, cette histoire va vous surprendre. Abonnez-vous pour ne rien manquer et dites-nous en commentaire ce qui vous a le plus marqué dans cette aventure ! #histoire #science #innovation #curiosité #inven
Vous êtes-vous déjà demandé à quel point nous sommes tous connectés ? Découvrez le paradoxe fascinant des six degrés de séparation et comment, en quelques étapes seulement, vous pourriez être lié à n'importe qui sur Terre. Le monde est plus petit qu'on ne le pense ! Abonnez-vous pour ne rien rater et dites-nous en commentaire ce qui vous a le plus surpris dans la vidéo. #science #curiosité #réseau
Vous pensez savoir ce qui arrive si on coupe la corde verte ? Nos invités parient sur la chute du poids, mais la surprise est au rendez-vous ! Expérience, suspense et bonne humeur garantis. Regardez jusqu'à la fin pour découvrir la réponse. Abonnez-vous pour ne rien rater et dites-nous en commentaire ce qui vous a le plus étonné ! #science #expérience #physique #curiosité #fun 👉 Cette chaîne est
Comment fonctionnent les fermetures éclair ? Sponsorisé par Hostinger. Hébergez OpenClaw sur un VPS Hostinger : https://www.hostinger.com/veritasiumopenclaw - et utilisez le code 'veritasium' pour une réduction supplémentaire. Si vous cherchez une boîte de modélisation moléculaire, essayez Snatoms, un kit que j'ai inventé où les atomes s'assemblent magnétiquement - https://ve42.co/SnatomsV Inscriv
Découvre comment les moteurs à réaction survivent à des températures extrêmes sans fondre comme des glaçons dans un four ! On t’explique les secrets fous des matériaux et des forces en jeu, et pourquoi chaque pale de turbine est un vrai super-héros. Tu veux comprendre comment ça tient ? Regarde la vidéo, abonne-toi et dis-nous en commentaire ce qui t’a le plus bluffé ! #science #technologie #avion
Découvrez l’incroyable histoire du caoutchouc naturel et de ses mésaventures fondantes et puantes ! Plongez dans les galères d’une époque où un simple été pouvait ruiner un business… et où un certain Charles a décidé de tout changer ! Prêt à en savoir plus ? Abonnez-vous à notre chaîne et dites-nous en commentaire ce qui vous a le plus surpris ! #histoire #science #invention #découverte #curiosité
Les machines incroyables qui fabriquent les puces informatiques les plus avancées. Sponsorisé par Brilliant – Pour apprendre gratuitement pendant 30 jours complets, rendez-vous sur https://brilliant.org/veritasium et commencez dès maintenant. De plus, nos spectateurs bénéficient de 20 % de réduction sur un abonnement Premium annuel pour un accès illimité quotidien à tous les cours Brilliant. ▀▀▀ 0
En este breve extracto de su episodio en el freeCodeCamp Podcast en Español, Alex comparte cómo pasó de aprender inglés a enseñarlo a otros desarrolladores. 🎙️ Puedes ver el episodio completo en este enlace: https://www.youtube.com/watch?v=diAj8ItRD1U 💻 Con freeCodeCamp puedes aprender a programar gratis y alcanzar tu meta de obtener un empleo como desarrollador: https://www.freecodecamp.org/esp
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En este episodio, Pedro Plasencia comparte cómo su pasión por enseñar y construir comunidad ha marcado su carrera como desarrollador web freelance. También habla sobre su aprendizaje autodidacta, la importancia del inglés y su rol en conferencias. Conéctate con Pedro Plasencia: 🔗 Redes de la comunidad: https://programacion-es.dev/redes ⭐️ Contenido ⭐️ ⌨️ (00:00:00) Inicio ⌨️ (00:02:47) Aprendizaj
En este breve extracto de su episodio en el freeCodeCamp Podcast en Español, Pedro Plasencia comparte sus inicios con Git y cómo su equipo incorporó métodos para colaborar de forma más organizada y eficiente. 🎙️ Puedes ver el episodio completo en este enlace: https://www.youtube.com/watch?v=6nRgphuXdgI 💻 Con freeCodeCamp puedes aprender a programar gratis y alcanzar tu meta de obtener un empleo
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En este episodio, Marcia Villalba comparte cómo su canal de YouTube la impulsó en la industria tech y le permitió combinar su pasión por enseñar con su experiencia como desarrolladora. También habla sobre la importancia de la comunidad, la curiosidad y la diversidad en tecnología. Conéctate con Marcia Villalba: 🔗 Todos los links: https://www.marcia.dev/links/ 🔗 Newsletter en español de noticias
En este breve extracto de su episodio en el freeCodeCamp Podcast en Español, Marcia Villalba comparte su motivación para aprender y crear y cómo su curiosidad por la automatización le permite aprender constantemente. 🎙️ Puedes ver el episodio completo en este enlace: https://www.youtube.com/watch?v=HXymoy2oxjw 💻 Con freeCodeCamp puedes aprender a programar gratis y alcanzar tu meta de obtener un
En este curso aprenderás a usar Godot 4 desde cero. En solo 3 horas, construirás tu primer videojuego 3D paso a paso, mientras descubres lo esencial de este motor de videojuegos, incluyendo escenas, nodos, scripting en GDScript, física, animaciones, y mucho más. ✏️ Curso creado por @LuisCanary. Instagram: https://www.instagram.com/luiscanary_/ Twitter: https://twitter.com/luiscanary Twitch: https:
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En este episodio, Leifer Méndez comparte cómo la curiosidad lo llevó a comenzar a programar desde los 13 años. Hablamos sobre su transición de freelancer a desarrollador de SaaS, la importancia de la comunicación efectiva en equipos tech, y cómo el ego puede frenar nuestro crecimiento profesional. Conéctate con Leifer Mendez 🔗 YouTube: https://www.youtube.com/LeiferMendez 🔗 LinkedIn: https://www
En este breve extracto de su episodio en el freeCodeCamp Podcast en Español, Leifer Méndez comparte su proceso de aprendizaje de nuevas tecnologías y cómo prefiere buscar recursos de aprendizaje visuales antes de comenzar a adentrarse en el código. 🎙️ Puedes ver el episodio completo en este enlace: https://www.youtube.com/watch?v=ljuiwfGx2CY 💻 Con freeCodeCamp puedes aprender a programar gratis
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En este episodio, Noemi León comparte su experiencia como ingeniera de software y líder de equipo. Hablamos sobre su pasión por enseñar, su trabajo creando cursos en LinkedIn Learning y su rol activo en comunidades como Women Techmakers. También ofrece consejos prácticos para quienes inician en tech. Conéctate con Noemi León: 🔗 Twitter: https://x.com/noeleo25 🔗 GitHub: https://github.com/noeleo2
