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How Can a Steel Ship Float?

Fri, 25 Sep 2026 23:32:46 +0200

A solid piece of steel sinks. A huge ship made from steel floats. The difference is not the metal. It is how much water the whole ...

Source/provenance: One Small Why Science on YouTube — https://www.youtube.com/watch?v=52bg6ltEImA
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What is underwater archeology?

Fri, 25 Sep 2026 20:07:10 +0200

When glaciers melted at the end of the last ice age, shorelines and artifacts from coastal communities were buried. Underwater archeologist Jessi Halligan suits up in scuba gear and digs through these underwater sites to learn about life in the early Americas. She talked to Flora about her discoveries at a key site in Florida. Listen to our podcast episode "Underwater archeology reveals clues about Ice Age humans" or hear it on your local public radio station this Friday!

Source/provenance: SciFri (Shorts) on YouTube — https://www.youtube.com/watch?v=-Dyfg5nBNJs
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Why magnets stumped scientists for so long - Rachel Yang

Fri, 25 Sep 2026 13:34:15 +0200

Explore the physics of magnetism, and how its properties are used in modern technologies like MRI machines, hard drives, and more. -- In the 1920s, physicists still had many unanswered questions about magnetism. While they knew that every electron and proton have invisible, magnetic fields that radiate out in closed loops from one end to the other, they wondered: what determines the direction of these magnetic fields? And if every atom is composed of these tiny magnets, why isn’t everything magnetic? Rachel Yang investigates. Lesson by Rachel Yang, directed by Tolga Yıldız, Kozmonot Animation Studio. This video was made possible in collaboration with Nobel Prize Outreach, and with support from the Sloan Foundation Learn more about how TED-Ed partnerships work: http://t.ted.com/Rbx7KCW Visit https://ed.ted.com/nobel-prize to explore more ideas, innovations, and achievements honored by the Nobel Prize Support Our Non-Profit Mission ---------------------------------------------- Support us on Patreon: http://t.ted.com/nlVpzFN Check out our merch: http://t.ted.com/upNeDi3 ---------------…

Source/provenance: TED-Ed on YouTube — https://www.youtube.com/watch?v=jG7ULeWUfDw
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Switchable explosives

Fri, 25 Sep 2026 01:24:31 +0200

A detonation wave moves from the top to bottom of a fluid-filled porous explosive. Read more at Physics Today: https://doi.org/10.1063/PT.6.1.20230414b Credit: C. B. Brown et al., Phys. Rev. Lett. 130, 116105 (2023) doi:10.1103/PhysRevLett.130.116105

Source/provenance: Physics Today (Shorts) on YouTube — https://www.youtube.com/watch?v=AG7Rp4GdoOY
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Cannonball! Dive into the latest @hirshhorn sculpture

Fri, 25 Sep 2026 01:24:27 +0200

A 28-foot-tall sculpture at our @hirshhorn is sure to make a big splash. 🌊 Handcrafted and equipped with a diving board, ladder, and lights, “Eight” (2026) by Elmgreen & Dragset is the latest artwork. “Eight” is the first work by the artist duo commissioned by an East Coast museum and continues their almost three-decade exploration of swimming pool motifs. For Elmgreen & Dragset, swimming pools represent public access, togetherness, and community. “‘Eight’ appears empty, yes,” explained the artist duo, “but ready to be filled by the imaginations of visitors.” Get ready to dive in when the new Hirshhorn Sculpture Garden reopens Oct. 31.

Source/provenance: Smithsonian (Shorts) on YouTube — https://www.youtube.com/watch?v=RTcCQ5Juhbg
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This robotic lab builds experiments on demand

Wed, 23 Sep 2026 19:03:09 +0200

MIT engineers have built a robotic optics lab that builds, runs, and dismantles an optics experiment, on demand. The setup centers on a robotic arm that physically arranges mirrors, lenses, and other optical components that are each set in custom-designed, QR-encoded housings. The robot arranges each component in precise alignments to direct and focus a beam of light (red laser). The autonomous system could speed up testing of high-tech materials, from solar cells and sensors to video displays and quantum technologies. This video is sped up 2x. (Learn more: https://news.mit.edu/2026/robotic-lab-runs-optics-experiments-on-demand-0917) Watch more videos from MIT: http://www.youtube.com/user/MITNewsOffice?sub_confirmation=1 The Massachusetts Institute of Technology is an independent, coeducational, privately endowed university in Cambridge, Massachusetts. Our mission is to advance knowledge; to educate students in science, engineering, technology, humanities and social sciences; and to tackle the most pressing problems facing the world today. We are a community of hands-on problem-solve…

Source/provenance: Massachusetts Institute of Technology (MIT) (Shorts) on YouTube — https://www.youtube.com/watch?v=AO1u9JoXLpk
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Turn tough topics into interactive visuals with Google Search 🌌

Wed, 23 Sep 2026 19:03:09 +0200

Some concepts are just too massive to picture in your head 🤯 Make complex topics finally click by generating interactive visuals right in Google Search. #Physics #GoogleSearch #StudyHacks

Source/provenance: Google (Shorts) on YouTube — https://www.youtube.com/watch?v=P7ICr5WAZUE
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The Dark History Behind Classic Nursery Rhymes | Mental Floss

Wed, 23 Sep 2026 16:54:33 +0200

Nursery rhymes might sound harmless, but many of them are tied to centuries of political unrest, economic struggles, and bizarre historical theories. In this episode of Mental Floss, Carara breaks down the dark interpretations behind famous rhymes like Ring Around the Rosie, Baa Baa Black Sheep, Jack and Jill, Three Blind Mice, London Bridge Is Falling Down, Rockabye Baby, and more. Read full article here: https://www.mentalfloss.com/literature/nursery-rhymes/dark-origins-11-classic-nursery-rhymes Don't miss a video! Subscribe NOW: https://www.youtube.com/@MentalFloss?sub_confirmation=1 About Mental Floss: Mental Floss is where curious people come for trivia-tastic information. Mental Floss produces lists of fun facts, debunks common misconceptions, and tells untold stories from history, science, culture and more. Website: http://www.mentalfloss.com Twitter: http://www.twitter.com/mental_floss Facebook: https://facebook.com/mentalflossmagazine Discord: https://discord.io/mentalfloss Copyright Notice: This video and YouTube channel contain dialog, music, and images that are property o…

Source/provenance: Mental Floss on YouTube — https://www.youtube.com/watch?v=SDtQ17XHwQY
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When a Greek and Armenian are in the same room…

Wed, 23 Sep 2026 16:54:33 +0200

Source/provenance: Geography Now on YouTube — https://www.youtube.com/watch?v=7m5vpHT0nQI
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What Does Ketamine Actually Do?

Wed, 23 Sep 2026 16:54:33 +0200

Ketamine has properties of a hallucinogen, a painkiller, and an antidepressant, but it doesn't fit neatly into any of those categories. So what is it? And is it safe? Hosted by: Savannah Geary (they/them) ---------- Support us for $8/month on Patreon and keep SciShow going! https://www.patreon.com/scishow Or support us directly: https://complexly.com/support Join our SciShow email list to get the latest news and highlights: https://mailchi.mp/scishow/email ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Shaji John, Timos Gies, Jon Coffman, Anita, Anne Herrington, Ashley Moquin, yeyette, David Johnston, Cye Stoner, Jp Lynch, Bethany Matthews, Chris Curry, J.V. Rosenbalm, Blood Doctor Kelly, Toyas Dhake, Reed Spilmann, Garrett Galloway, Friso, Lyndsay Brown, Jeremy Mattern, Jaap Westera, Matt Curls, Eric Jensen, Chris Mackey, Adam Brainard, Jacob Puthoff, Piya Shedden, Steve Gums, Alex Hackman, Kevin Knupp, Chris Peters, Kevin Bealer, Joseph Ruf, Jason A Saslow ---------- Looking for SciShow elsewhere on the internet?…

Source/provenance: SciShow on YouTube — https://www.youtube.com/watch?v=NSlTyM3tEHc
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Why Runways Have to Be Repainted

Wed, 23 Sep 2026 16:54:32 +0200

Thank you, Bonnie Bees, for making this video possible: https://www.patreon.com/cgpgrey ## Related Videos + Talking about Making the video on Cortex: https://www.youtube.com/watch?v=dYYPV-ZlRIk + How to be a Pirate: https://www.youtube.com/watch?v=3YFeE1eDlD0 + Social Security Numbers: https://www.youtube.com/watch?v=Erp8IAUouus + Metric Paper: https://www.youtube.com/watch?v=pUF5esTscZI ## Special Thanks + Mylos Besseling: www.youtube.com/c/mylosairplanefan + Dr. Charlie Freeman: Department Chair and Distinguished Teaching Professor at SUNY Geneseo + Doug Moss: Owner of AeroPacific Consulting + John H. Mott: Advanced Aviation Analytics Institute for Research at Purdue University + Office of the Secretary General: International Civil Aviation Organization + Derek Muller: https://www.youtube.com/veritasium ## Patreon Executive Producers: Bobby, Bob Kunz, Andrew Bereza, Rebecca Wortham, Nevin Spoljaric, Donal Botkin, BN-12, Marco Arment, George Lin, Richard Jenkins, Phil Gardner, Martin, Steven Grimm, David Tyler, iulus, Xueqi, Colin Millions, Oliver Steele, Andrea Di Biagio, Henry Ng,…

Source/provenance: CGP Grey on YouTube — https://www.youtube.com/watch?v=HSRmfNDk87s
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How To Fix ROCK HARD Brown Sugar

Wed, 23 Sep 2026 16:54:32 +0200

Source/provenance: Vsauce on YouTube — https://www.youtube.com/watch?v=V6HRAcwFyec
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The Wavy Window Paradox

Wed, 23 Sep 2026 16:54:31 +0200

Get your very own Garlic Plushie now, while you still can: https://www.makeship.com/products/garlic-plushie We look through windows every single day, yet the fact we can see a clear image through them is actually kind of amazing - this video explains why. More garlic: https://www.youtube.com/watch?v=LT1UuQO2C6g Snell's Law: https://personal.math.ubc.ca/~cass/courses/m309-01a/chu/Fundamentals/snell.htm Link to Patreon Supporters: http://www.minutephysics.com/supporters/ And Facebook: http://facebook.com/minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich Produced by Joshua Chawner

Source/provenance: MinutePhysics on YouTube — https://www.youtube.com/watch?v=4YvnVJRlQQs
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This Machine Made Wartime Germany (Almost) Impossible to Defeat

Wed, 23 Sep 2026 16:54:31 +0200

How was the "unbreakable" enigma cracked? Sponsored by Incogni - use code veritasium at https://incogni.com/veritasium to get an exclusive 60% off your annual subscription. If you’re looking for a molecular modelling kit, try Snatoms, a kit I invented where the atoms snap together magnetically - https://ve42.co/SnatomsV For the latest science news, and for an exclusive bonus Q&A with the director of this video, sign up to the Veritasium newsletter - https://ve42.co/Newsletter For early access to work in progress videos join our patreon https://ve42.co/VePatreon ▀▀▀ 0:00 Who invented Enigma? 4:16 How did Enigma work? 10:51 The Secret Spy Mansion 13:10 The First Codebreakers Who Broke Enigma 16:45 Trying To Decrypt An Enigma Message 22:35 Who was Alan Turing? 26:30 How Enigma’s Flaws Were Exploited 34:27 Breaking Enigma - The Bombe 41:39 The Naval Enigma 44:35 What did Alan Turing do after Bletchley Park? ▀▀▀ A huge thanks out to Sir Dermot Turing, Jonah Weinbaum, Andrew Fryer, John Pickles, Peter Hoath, Robert Dowell and all of the experts at Bletchley Park & The National Museum of Co…

Source/provenance: Veritasium on YouTube — https://www.youtube.com/watch?v=JsBZOcqZerk
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Blind Ranking Numbers (James Grime)

Wed, 23 Sep 2026 16:54:31 +0200

James Grime blind ranks five numbers and constants. More links & stuff in full description below ↓↓↓ Related videos 1 is not prime: https://youtu.be/IQofiPqhJ_s e: https://youtu.be/AuA2EAgAegE Root 2: https://youtu.be/5sKah3pJnHI Graham's Number: https://youtu.be/HX8bihEe3nA Tau: https://youtu.be/83ofi_L6eAo

Source/provenance: Numberphile on YouTube — https://www.youtube.com/watch?v=UmuMgA_RxnU
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Electric charge and electric force | AP Physics | Khan Academy

Wed, 23 Sep 2026 16:54:30 +0200

Electric charge is a scalar quantity and is described as positive or negative. Coulomb’s law describes the electrostatic force between two charged objects as directly proportional to the magnitude of each of the charges and inversely proportional to the square of the distance between the objects. The direction of the electrostatic force depends on the signs of the charges of the interacting objects and is along the line of separation between the objects. Free space has a constant value of electric permittivity that appears in physical relationships. Sections: 00:00 - What is electric charge? 01:39 - Positive and negative charge in atoms 02:30 - The elementary charge 04:03 - Coulomb’s law 06:00 - Coulomb’s constant and permittivity 07:36 - How materials affect electric force 09:18 - Adding forces from multiple charges 11:57 - Summary ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan A…

Source/provenance: Khan Academy on YouTube — https://www.youtube.com/watch?v=lU8qZ0UyZUk
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Why Are US Politics Today So Divisive?: Crash Course US Government #1

Wed, 23 Sep 2026 16:53:55 +0200

How did U.S. politics get so divisive? In this episode of Crash Course Big Questions: U.S. Government and Politics, we’ll pull back the curtain on how Republican and Democrat became synonymous with “conservative” and “liberal,” and why politics today has gotten so polarized and personal. Chapter 1 - Introduction: Political Polarization 00:00 Chapter 2 - Ideological Sorting 2:28 Chapter 3 - Social Sorting 6:24 Chapter 4 - Political Identities 7:57 Chapter 5- Consequences of Political Polarization 9:05 Chapter 6 - Review & Credits 10:59 Sources: https://docs.google.com/document/d/1naWmymw68W9x6GAix9e4jTrEIRXT0-F3IniP3LSscOo/edit?tab=t.0 For supplemental resources related to the topics covered in this episode, check out: https://usafacts.org/crash-course/political-polarization/ Check out our CC US Government Extracurricular Playlist here: https://www.youtube.com/playlist?list=PLNTetGA7m3IA *** Support us for $5/month on Patreon to keep Crash Course free for everyone forever! https://www.patreon.com/crashcourse Or support us directly: https://complexly.com/support Join our Crash Course e…

Source/provenance: CrashCourse on YouTube — https://www.youtube.com/watch?v=dsGoS_M7AW8
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The last IMO problem AI could not solve

Wed, 23 Sep 2026 16:53:55 +0200

Full video: https://youtu.be/Nbwv5wHQoj0

Source/provenance: 3Blue1Brown on YouTube — https://www.youtube.com/watch?v=bRQEWPA832A
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4 ways to fix your attention span - Shannon Odell

Wed, 23 Sep 2026 16:46:18 +0200

Explore 4 strategies to build a better attention span, manage distractions, and help your brain stay focused on its tasks. -- Check out our 500-piece jigsaw puzzle, created in partnership with Ravensburger and featuring art from this very TED-Ed animation: http://t.ted.com/3kB0raN In today’s world, our attention is being pulled in more directions than ever before. This can make finding focus— for work, school, and even the things we love— feel almost impossible. So, how can you improve and better protect your attention span? Shannon Odell shares strategies on how to manage distractions and give your brain the best chance at focusing. Lesson by Shannon Odell, directed by Héloïse Dorsan-Rachet. This video made possible in collaboration with Ravensburger Learn more about how TED-Ed partnerships work: https://bit.ly/TEDEdPartner Support Our Non-Profit Mission ---------------------------------------------- Support us on Patreon: http://bit.ly/TEDEdPatreon Check out our merch: http://bit.ly/TEDEDShop ---------------------------------------------- Connect With Us ---------------------------…

Source/provenance: TED-Ed on YouTube — https://www.youtube.com/watch?v=N2uQWfV6Jr4
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Business and Healthcare Programs at Texas Healthtech Institute

Wed, 26 Aug 2026 14:33:03 +0200

⁣Learn about the Associate Degree and Certificate programs offered by Texas Healthtech Institute in Texas. This presentation covers business accounting, medical assisting, medical billing and coding, phlebotomy, office administration, and health information technology, providing an overview of career-oriented education options.