The Shadow Illusion

Cut any shape hole into a piece of cardboard and hold it up to the sunlight. When sunlight shines through this hole, it casts a circular image on the wall regardless of the shape of the hole. Why does this happen? The size of the hole also doesn't affect the size of the image. This counterintuitive demonstration shows that the hole is acting like a pinhole camera, producing an image of the sun on the wall. Therefore the size and shape of the hole have no effect on the size and shape of the image.


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How long can hair grow? - Maksim Plikus

Dig into what biological factors influence hair growth, how it can change as you age, and how to take control of your scalp. -- At age 44, Xie Qiuping cut her hair for the first time in over three decades. Her impressive locks extended over 5 meters — earning the Guinness World Record for the world’s longest hair. But even with this record-setting feat, her hair might not have reached its maximum possible length. So, just how long can human hair actually grow? Maksim Plikus digs into what factors influence hair growth. Lesson by Maksim Plikus, directed by Matt Partridge. Support Our Non-Profit Mission ---------------------------------------------- Support us on Patreon: http://bit.ly/TEDEdPatreon Check out our merch: http://bit.ly/TEDEDShop ---------------------------------------------- Connect With Us ---------------------------------------------- Sign up for our newsletter: http://bit.ly/TEDEdNewsletter Follow us on Facebook: http://bit.ly/TEDEdFacebook Find us on Twitter: http://bit.ly/TEDEdTwitter Peep us on Instagram: http://bit.ly/TEDEdInstagram ---------------------------------------------- Keep Learning ---------------------------------------------- View full lesson: https://ed.ted.com/lessons/how-long-can-hair-grow-maksim-plikus Dig deeper with additional resources: https://ed.ted.com/lessons/how-long-can-hair-grow-maksim-plikus/digdeeper Animator's website: https://www.mattpartridgeanimation.com ---------------------------------------------- Thank you so much to our patrons for your support! Without you this video would not be possible! Jose Arcadio Valdes Franco, Sebastiaan Vleugels, Karl Laius, JY Kang, Abhishek Goel, Heidi Stolt, Nicole Sund, Karlee Finch, Mario Mejia, Denise A Pitts, Doug Henry, Keven Webb, Mihai Sandu, Deepak Iyer, Javid Gozalov, Kyanta Yap, Rebecca Reineke, William Biersdorf, Patricia Alves Panagides, Yvette Mocete, Cyrus Garay, Samuel Barbas, LadyGeek, Marin Kovachev, Penelope Misquitta, Hans Peng, Gaurav Mathur, Erik Biemans, Tony, Michelle, Katie and Josh Pedretti, Hoai Nam Tran, Kack-Kyun Kim, Michael Braun-Boghos, zjweele13, Anna-Pitschna Kunz, Edla Paniguel, Thomas Mungavan, Jaron Blackburn, Venkat Venkatakrishnan, ReuniteKorea, Aaron Henson, Rohan Gupta, Begum Tutuncu, Brian Richards, Jørgen Østerpart, Tyron Jung, Carsten Tobehn, Katie Dean, Ezgi Yersu, Gerald Onyango, and alessandra tasso.


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What’s the origin of the universe? 👀🔭🪐 #didyouknow #funfacts #etymology

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Sovereign Citizen Plays Stupid Games, Wins Stupid Prizes... Bench Warrant Issued!

Hey guys and welcome to today's video! Today we have 3 sovereign citizens in court to laugh at! The first one refuses to identify as the defendant, so the judge issues a bench warrant for his arrest. We then have a sovereign citizen karen in court, who identifies as a woman of peace. Finally, we have a follow up to a case that I have been following, where a competency exam was requested by his own attorney, resulting in a complete crash out in court! To Support The Channel : Team Skeptic Fund : https://paypal.me/TeamSkepticYT Become A Channel Member : https://www.youtube.com/channel/UCawl3BI9azbMB5DQqJNpRrg/join Join Our Patreon : https://www.patreon.com/TeamSkeptic #Court #CourtCam #TeamSkeptic


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Zipf Zapf Zopf!

Zipf Zapf Zopf!


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Waterfowl's Feathers Are The Perfect All-Weather Jacket | #DeepLook #Shorts

Having well-groomed feathers grants all birds some degree of water resistance, but aquatic birds take it to another level. Learn more in our episode "What Actually Makes Water Roll Off a Duck's Back?" 👉 https://youtu.be/Q-8GXk9r0ik #youtubeshorts #duck #deeplook


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We Turned an Egg Into a Bouncy Ball

We did some egg-cellent experiments when making the latest Big Ideas. Learn how you can turn an egg into a bouncing ball at home (don’t forget the paper towels). To find out why we’re dissolving eggshells, check out the latest Big Ideas episode 👉 https://youtu.be/ilpmpCEDK8A #youtubeshorts #eggs #deeplook


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