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Videos uploaded by user “TED-Ed”
Why sitting is bad for you - Murat Dalkilinç
 
05:05
View full lesson: http://ed.ted.com/lessons/why-sitting-is-bad-for-you-murat-dalkilinc Sitting down for brief periods can help us recover from stress or recuperate from exercise. But nowadays, our lifestyles make us sit much more than we move around. Are our bodies built for such a sedentary existence? Murat Dalkilinç investigates the hidden risks of sitting down. Lesson by Murat Dalkilinç, animation by Oxbow Creative.
Views: 3584290 TED-Ed
What makes muscles grow? - Jeffrey Siegel
 
04:20
View full lesson: https://ed.ted.com/lessons/what-makes-muscles-grow-jeffrey-siegel We have over 600 muscles in our bodies that help bind us together, hold us up, and help us move. Your muscles also need your constant attention, because the way you treat them on a daily basis determines whether they will wither or grow. Jeffrey Siegel illustrates how a good mix of sleep, nutrition and exercise keep your muscles as big and strong as possible. Lesson by Jeffrey Siegel, animation by Brett Underhill.
Views: 6748752 TED-Ed
The wars that inspired Game of Thrones - Alex Gendler
 
06:01
View full lesson: http://ed.ted.com/lessons/the-wars-that-inspired-game-of-thrones-alex-gendler Beginning around 1377, medieval England was shaken by a power struggle between two noble families, which spanned generations and involved a massive cast of characters, complex motives and shifting loyalties. Sound familiar? Alex Gendler illustrates how the historical conflict known as the Wars of the Roses served as the basis for much of the drama in Game of Thrones. Lesson by Alex Gendler, animation by Brett Underhill.
Views: 3795157 TED-Ed
Can you solve the bridge riddle? - Alex Gendler
 
03:50
View full lesson: https://ed.ted.com/lessons/can-you-solve-the-bridge-riddle-alex-gendler Want more? Try the buried treasure riddle: https://www.youtube.com/watch?v=tCeklW2e6_E Taking that internship in a remote mountain lab might not have been the best idea. Pulling that lever with the skull symbol just to see what it did probably wasn’t so smart either. But now is not the time for regrets because you need to get away from these mutant zombies...fast. Can you use math to get you and your friends over the bridge before the zombies arrive? Alex Gendler shows how. Lesson by Alex Gendler, animation by Artrake Studio.
Views: 13091443 TED-Ed
The benefits of a bilingual brain - Mia Nacamulli
 
05:04
Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/how-speaking-multiple-languages-benefits-the-brain-mia-nacamulli It’s obvious that knowing more than one language can make certain things easier — like traveling or watching movies without subtitles. But are there other advantages to having a bilingual (or multilingual) brain? Mia Nacamulli details the three types of bilingual brains and shows how knowing more than one language keeps your brain healthy, complex and actively engaged. Lesson by Mia Nacamulli, animation by TED-Ed.
Views: 4219130 TED-Ed
Plato’s Allegory of the Cave - Alex Gendler
 
04:33
View full lesson: http://ed.ted.com/lessons/plato-s-allegory-of-the-cave-alex-gendler Twenty four hundred years ago, Plato, one of history’s most famous thinkers, said life is like being chained up in a cave forced to watch shadows flitting across a stone wall. Beyond sounding quite morbid, what exactly did he mean? Alex Gendler unravels Plato's Allegory of the Cave, found in Book VII of "The Republic." Lesson by Alex Gendler, animation by Stretch Films, Inc.
Views: 2476626 TED-Ed
The benefits of good posture - Murat Dalkilinç
 
04:27
View full lesson: http://ed.ted.com/lessons/the-benefits-of-good-posture-murat-dalkinic Has anyone ever told you, “Stand up straight!” or scolded you for slouching at a family dinner? Comments like that might be annoying—but they’re not wrong. Your posture is the foundation for every movement your body makes and can determine how well your body adapts to the stresses on it. Murat Dalkilinç gives the pros of good posture. Lesson by Murat Dalkilinç, animation by Nadav Arbel.
Views: 4340490 TED-Ed
Can you solve the prisoner hat riddle? - Alex Gendler
 
04:35
View full lesson: http://ed.ted.com/lessons/can-you-solve-the-prisoner-hat-riddle-alex-gendler Want more? Try the buried treasure riddle: https://www.youtube.com/watch?v=tCeklW2e6_E You and nine other individuals have been captured by super-intelligent alien overlords. The aliens think humans look quite tasty, but their civilization forbids eating highly logical and cooperative beings. Unfortunately, they’re not sure whether you qualify, so they decide to give you all a test. Can you solve this hat riddle? Alex Gendler shows how. Lesson by Alex Gendler, animation by Artrake Studio.
Views: 12103904 TED-Ed
Can you solve the temple riddle? - Dennis E. Shasha
 
04:13
View full lesson: http://ed.ted.com/lessons/can-you-solve-the-temple-riddle-dennis-e-shasha Your expedition finally stands at the heart of the ancient temple. But as you study the inscriptions in the darkness, two wisps of green smoke burst forth. The walls begin to shake. The giant sandglass begins flowing with less than an hour before it empties, and a rumbling tells you that you don’t want to be around when that happens. Can you use math to escape the temple? Dennis E. Shasha shows how. Lesson by Dennis E. Shasha, animation by Artrake Studio.
Views: 6170726 TED-Ed
The great conspiracy against Julius Caesar - Kathryn Tempest
 
05:58
View full lesson: http://ed.ted.com/lessons/the-great-conspiracy-against-julius-caesar-kathryn-tempest On March 15th, 44 BCE, Roman dictator Julius Caesar was assassinated by a group of about 60 of his own senators. Why did these self-titled Liberators want him dead? And why did Brutus, whose own life had been saved by Caesar, join in the plot? Kathryn Tempest investigates the personal and political assassination of Julius Caesar. Lesson by Kathryn Tempest, animation by Brett Underhill.
Views: 3056963 TED-Ed
How playing an instrument benefits your brain - Anita Collins
 
04:45
Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/how-playing-an-instrument-benefits-your-brain-anita-collins When you listen to music, multiple areas of your brain become engaged and active. But when you actually play an instrument, that activity becomes more like a full-body brain workout. What's going on? Anita Collins explains the fireworks that go off in musicians' brains when they play, and examines some of the long-term positive effects of this mental workout. Lesson by Anita Collins, animation by Sharon Colman Graham.
Views: 6579375 TED-Ed
The tragic myth of Orpheus and Eurydice - Brendan Pelsue
 
04:41
Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-tragic-myth-of-orpheus-and-eurydice-brendan-pelsue The marriage of Orpheus, the greatest of all poets and musicians, to Eurydice, a wood nymph, was heralded as the perfect union. Anyone could tell the couple was deeply in love. So when their wedding ceremony ended in Eurydice's untimely death, Orpheus had no choice but to venture into the underworld to try to reclaim his lost love. Brendan Pelsue shares the tragic myth of Orpheus and Eurydice. Lesson by Brendan Pelsue, animation by Anton Bogaty. Thank you so much to our patrons for your support! Without you this video would not be possible! Silas Schwarz, Fabio Peters, MJ Tan Mingjie, Yansong Li, Jason A Saslow, Michael Aquilina, Joanne Luce, Henry Li, Elias Wewel, Kyle Nguyen, Taylor Hunter, Noa Shore, Lex Azevedo, Merit Gamertsfelder, Bev Millar, Rishi Pasham, Jhuval , SookKwan Loong, Daniel Day, Nick Johnson, Bruno Pinho, Javier Aldavaz, Rodrigo Carballo, Marc Veale, Boytsov Ilya, Bozhidar Karaargirov, ilya bondarik, maxi kobi einy, Runarm , Misaki Sato, Peter Koebel, Levi Cook, Alex Kongkeo, Craig Sheldon, Andrew Bosco and Catherine Sverko.
Views: 1941487 TED-Ed
What would happen if you didn’t sleep? - Claudia Aguirre
 
04:35
View full lesson: http://ed.ted.com/lessons/what-would-happen-if-you-didn-t-sleep-claudia-aguirre In the United States, it’s estimated that 30 percent of adults and 66 percent of adolescents are regularly sleep-deprived. This isn’t just a minor inconvenience: staying awake can cause serious bodily harm. Claudia Aguirre shows what happens to your body and brain when you skip sleep. Lesson by Claudia Aguirre, animation by TED-Ed.
Views: 5339363 TED-Ed
Why is glass transparent? - Mark Miodownik
 
04:08
View full lesson: http://ed.ted.com/lessons/why-is-glass-transparent-mark-miodownik If you look through your glasses, binoculars or a window, you see the world on the other side. How is it that something so solid can be so invisible? Mark Miodownik melts the scientific secret behind amorphous solids. Lesson by Mark Miodownik, animation by Provincia Studio.
Views: 2116161 TED-Ed
The psychology of narcissism - W. Keith Campbell
 
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View full lesson: http://ed.ted.com/lessons/the-psychology-of-narcissism-w-keith-campbell Narcissism isn’t just a personality type that shows up in advice columns; it’s actually a set of traits classified and studied by psychologists. But what causes it? And can narcissists improve on their negative traits? W. Keith Campbell describes the psychology behind the elevated and sometimes detrimental self-involvement of narcissists. Lesson by W. Keith Campbell, animation by TOGETHER.
Views: 4583894 TED-Ed
Why do cats act so weird? - Tony Buffington
 
04:58
Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/why-do-cats-act-so-weird-tony-buffington They’re cute, they’re lovable, and judging by the 26 billion views on over 2 million YouTube videos of them, one thing is certain: cats are very entertaining. But their strange feline behaviors, both amusing and baffling, leave many of us asking: Why do cats do that? Tony Buffington explains the science behind some of your cat’s strangest behaviors. Lesson by Tony Buffington, animation by Chintis Lundgren.
Views: 5377692 TED-Ed
What makes a hero? - Matthew Winkler
 
04:34
View full lesson: http://ed.ted.com/lessons/what-makes-a-hero-matthew-winkler What trials unite not only Harry Potter or Frodo Baggins but many of literature's most interesting heroes? And what do ordinary people have in common with these literary heroes? Matthew Winkler takes us step-by-step through the crucial events that make or break a hero. Lesson by Matthew Winkler, animation by Kirill Yeretsky.
Views: 4361487 TED-Ed
How to practice effectively...for just about anything - Annie Bosler and Don Greene
 
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View full lesson: http://ed.ted.com/lessons/how-to-practice-effectively-for-just-about-anything-annie-bosler-and-don-greene Mastering any physical skill takes practice. Practice is the repetition of an action with the goal of improvement, and it helps us perform with more ease, speed, and confidence. But what does practice actually do to make us better at things? Annie Bosler and Don Greene explain how practice affects the inner workings of our brains. Lesson by Annie Bosler and Don Greene, animation by Martina Meštrović.
Views: 3449901 TED-Ed
The myth of Thor's journey to the land of giants - Scott A. Mellor
 
05:18
Download a free audiobook and support TED-Ed's nonprofit mission: http://adbl.co/2om4O4Q Check out Neil Gaiman's "Norse Mythology": http://bit.ly/2opZptA View full lesson: https://ed.ted.com/lessons/the-myth-of-thor-s-journey-to-the-land-of-giants-scott-a-mellor Thor – son of Odin, god of thunder, and protector of mankind – struggled mightily against his greatest challenge yet: opening a bag of food. How had the mighty god fallen so far? Scott Mellor tells the myth of Thor's journey to Utgard. Lesson by Scott A. Mellor, animation by Rune F.B. Hansen. Thank you so much to our patrons for your support! Without you this video would not be possible! Alejandro Cachoua, Thomas Mungavan, Elena Crescia, Edla Paniguel, Sarah Lundegaard, Charlsey, Anna-Pitschna Kunz, Tim Armstrong, Alessandro, Erika Blanquez, Ricki Daniel Marbun, zjweele13, Judith Benavides, Znosheni Kedy, Caitlin de Falco, Scheherazade Kelii, Errys, James Bruening, Michael Braun-Boghos, Ricardo Diaz, Kack-Kyun Kim, Alexandrina Danifeld, Danny Romard, Yujing Jiang, Stina Boberg, Mariana Ortega, Anthony Wiggins, Hoai Nam Tran, Joe Sims, David Petrovič, Chris Adriaensen, Lowell Fleming, Lorenzo Margiotta, Amir Ghandeharioon, Anuj Tomar, Sunny Patel, Rachel Birenbaum, Vijayalakshmi, Devesh Kumar, Uday Kishore, Aidan Forero, Leen Mshasha, Allan Hayes, Thomas Bahrman, Alexander Baltadzhiev, Vaibhav Mirjolkar, Tony, Michelle, Katie and Josh Pedretti, Erik Biemans, Gaurav Mathur, Sameer Halai, Hans Peng, Tekin Gültekin, Thien Loc Huynh, Bogdan Alexandru Stoica, Hector Quintanilla, PH Chua, Raheem, and Varinia Bohoslavsky.
Views: 1742425 TED-Ed
Schrödinger's cat: A thought experiment in quantum mechanics - Chad Orzel
 
04:38
View full lesson: http://ed.ted.com/lessons/schrodinger-s-cat-a-thought-experiment-in-quantum-mechanics-chad-orzel Austrian physicist Erwin Schrödinger, one of the founders of quantum mechanics, posed this famous question: If you put a cat in a sealed box with a device that has a 50% chance of killing the cat in the next hour, what will be the state of the cat when that time is up? Chad Orzel investigates this thought experiment. Lesson by Chad Orzel, animation by Agota Vegso.
Views: 2427782 TED-Ed
What makes something "Kafkaesque"? - Noah Tavlin
 
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View full lesson: http://ed.ted.com/lessons/what-makes-something-kafkaesque-noah-tavlin The term Kafkaesque has entered the vernacular to describe unnecessarily complicated and frustrating experiences, especially with bureaucracy. But does standing in a long line to fill out confusing paperwork really capture the richness of Kafka’s vision? Beyond the word’s casual use, what makes something "Kafkaesque"? Noah Tavlin explains. Lesson by Noah Tavlin, animation by TED-Ed.
Views: 2854552 TED-Ed
Why don't perpetual motion machines ever work? - Netta Schramm
 
05:31
Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/why-don-t-perpetual-motion-machines-ever-work-netta-schramm Perpetual motion machines — devices that can do work indefinitely without any external energy source — have captured many inventors’ imaginations because they could totally transform our relationship with energy. There’s just one problem: they don’t work. Why not? Netta Schramm describes the pitfalls of perpetual motion machines. Lesson by Netta Schramm, animation by TED-Ed.
Views: 4489955 TED-Ed
What is depression? - Helen M. Farrell
 
04:29
View full lesson: http://ed.ted.com/lessons/what-is-depression-helen-m-farrell Depression is the leading cause of disability in the world; in the United States, close to ten percent of adults struggle with the disease. But because it’s a mental illness, it can be a lot harder to understand than, say, high cholesterol. Helen M. Farrell examines the symptoms and treatments of depression, and gives some tips for how you might help a friend who is suffering. Lesson by Helen M. Farrell, animation by Artrake Studio.
Views: 3993220 TED-Ed
The science of attraction - Dawn Maslar
 
04:34
View full lesson: http://ed.ted.com/lessons/the-science-of-attraction-dawn-maslar Romantic chemistry is all about warm, gooey feelings that gush from the deepest depths of the heart...right? Not quite. Actually, the real boss behind attraction is your brain, which runs through a very quick, very complex series of calculations when assessing a potential partner. Dawn Maslar explores how our five senses contribute to this mating game, citing some pretty wild studies along the way. Lesson by Dawn Maslar, animation by TOGETHER.
Views: 3631663 TED-Ed
Meet the tardigrade, the toughest animal on Earth - Thomas Boothby
 
04:10
View full lesson: http://ed.ted.com/lessons/meet-the-tardigrade-the-toughest-animal-on-earth-thomas-boothby Without water, a human can only survive for about 100 hours. But there’s a creature so resilient that it can go without it for decades. This 1-millimeter animal can survive both the hottest and coldest environments on earth, and can even withstand high levels of radiation. Thomas Boothby introduces us to the tardigrade, one of the toughest creatures on Earth. Lesson by Thomas Boothby, animation by Boniato Studio.
Views: 2231641 TED-Ed
How sugar affects the brain - Nicole Avena
 
05:03
Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/how-sugar-affects-the-brain-nicole-avena When you eat something loaded with sugar, your taste buds, your gut and your brain all take notice. This activation of your reward system is not unlike how bodies process addictive substances such as alcohol or nicotine -- an overload of sugar spikes dopamine levels and leaves you craving more. Nicole Avena explains why sweets and treats should be enjoyed in moderation. Lesson by Nicole Avena, animation by STK Films.
Views: 6693848 TED-Ed
Why incompetent people think they're amazing - David Dunning
 
05:08
Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/why-incompetent-people-think-they-re-amazing-david-dunning How good are you with money? What about reading people’s emotions? How healthy are you, compared to other people you know? Knowing how our skills stack up against others is useful in many ways. But psychological research suggests that we’re not very good at evaluating ourselves accurately. In fact, we frequently overestimate our own abilities. David Dunning describes the Dunning-Kruger effect. Lesson by David Dunning, directed by Wednesday Studio, music and sound by Tom Drew. Thank you so much to our patrons for your support! Without you this video would not be possible! Juan, Jordan Tang, Kent Logan, Alexandra Panzer, Jen, Ellen Spertus, Ryan Mehendale, Mary Sawyer, Scott Gass, Ruth Fang, Mayank Kaul, Hazel Lam, Tan YH, Be Owusu, Samuel Doerle, David Rosario, Katie Winchester, Michel Reyes, Dominik Kugelmann, Siamak H, Stephen A. Wilson, Manav Parmar, Jhiya Brooks, David Lucsanyi, Querida Owens.
Views: 2936207 TED-Ed
How does anesthesia work? - Steven Zheng
 
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View full lesson: http://ed.ted.com/lessons/how-does-anesthesia-work-steven-zheng When under anesthesia, you can’t move, form memories, or — hopefully — feel pain. And while it might just seem like you are asleep for that time, you actually aren’t. What’s going on? Steven Zheng explains what we know about the science behind anesthesia. Lesson by Steven Zheng, animation by Zedem Media.
Views: 4232750 TED-Ed
The unexpected math behind Van Gogh's "Starry Night" - Natalya St. Clair
 
04:39
Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/the-unexpected-math-behind-van-gogh-s-starry-night-natalya-st-clair Physicist Werner Heisenberg said, “When I meet God, I am going to ask him two questions: why relativity? And why turbulence? I really believe he will have an answer for the first.” As difficult as turbulence is to understand mathematically, we can use art to depict the way it looks. Natalya St. Clair illustrates how Van Gogh captured this deep mystery of movement, fluid and light in his work. Lesson by Natalya St. Clair, animation by Avi Ofer.
Views: 6472588 TED-Ed
Who were the Vestal Virgins, and what was their job? - Peta Greenfield
 
04:33
View full lesson: http://ed.ted.com/lessons/who-were-the-vestal-virgins-and-what-was-their-job-peta-greenfield In ancient Rome, Vestal Virgins were tasked with keeping vigil over the flame of Vesta, the virgin goddess of the hearth. The flame represented two things: the continuation of Rome as a power in the world and the continuing virginity of Vesta’s priestesses. But what was life really like for these Vestal Virgins? Peta Greenfield goes back in time to find out. Lesson by Peta Greenfield, animation by Kozmonot Animation Studio.
Views: 3007892 TED-Ed
What is the Heisenberg Uncertainty Principle? - Chad Orzel
 
04:44
View full lesson: http://ed.ted.com/lessons/what-is-the-heisenberg-uncertainty-principle-chad-orzel The Heisenberg Uncertainty Principle states that you can never simultaneously know the exact position and the exact speed of an object. Why not? Because everything in the universe behaves like both a particle and a wave at the same time. Chad Orzel navigates this complex concept of quantum physics. Lesson by Chad Orzel, animation by Henrik Malmgren.
Views: 1938108 TED-Ed
The rise and fall of the Berlin Wall - Konrad H. Jarausch
 
06:26
Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-rise-and-fall-of-the-berlin-wall-konrad-h-jarausch On August 13, 1961, construction workers began tearing up streets and erecting barriers in Berlin. This night marked the beginning of one of history’s most infamous dividing lines: the Berlin Wall. Construction continued for a decade as the wall cut through neighborhoods, separated families, and divided not just Germany, but the world. Konrad H. Jarausch details the history of the Berlin Wall. Lesson by Konrad H. Jarausch, directed by Remus & Kiki.
Views: 2235410 TED-Ed
What would happen if you didn’t drink water? - Mia Nacamulli
 
04:52
Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/what-would-happen-if-you-didn-t-drink-water-mia-nacamulli Water is essentially everywhere in our world, and the average human is composed of between 55 and 60% water. So what role does water play in our bodies, and how much do we actually need to drink to stay healthy? Mia Nacamulli details the health benefits of hydration. Lesson by Mia Nacamulli, animation by Chris Bishop.
Views: 6752013 TED-Ed
The Egyptian Book of the Dead: A guidebook for the underworld - Tejal Gala
 
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View full lesson: http://ed.ted.com/lessons/the-egyptian-book-of-the-dead-tejal-gala Ancient Egyptians believed that in order to become immortal after death, a spirit must first pass through the underworld — a realm of vast caverns, lakes of fire, and magical gates. Needless to say, one needed to come prepared. But how? Tejal Gala describes an Egyptian "Book of the Dead" -- a customized magic scroll written by the living to promote a smooth passage to the afterlife when they died. Lesson by Tejal Gala, animation by Silvia Prietov.
Views: 2065012 TED-Ed
What is dyslexia? - Kelli Sandman-Hurley
 
04:35
View full lesson: http://ed.ted.com/lessons/what-is-dyslexia-kelli-sandman-hurley Dyslexia affects up to 1 in 5 people, but the experience of dyslexia isn't always the same. This difficulty in processing language exists along a spectrum -- one that doesn't necessarily fit with labels like "normal" and "defective." Kelli Sandman-Hurley urges us to think again about dyslexic brain function and to celebrate the neurodiversity of the human brain. Lesson by Kelli Sandman-Hurley, animation by Marc Christoforidis.
Views: 2381775 TED-Ed
Why elephants never forget - Alex Gendler
 
05:23
View full lesson: http://ed.ted.com/lessons/why-elephants-never-forget-alex-gendler It’s a common saying that elephants never forget. But the more we learn about elephants, the more it appears that their impressive memory is only one aspect of an incredible intelligence that makes them some of the most social, creative, and benevolent creatures on Earth. Alex Gendler takes us into the incredible, unforgettable mind of an elephant. Lesson by Alex Gendler, animation by Avi Ofer.
Views: 2064657 TED-Ed
The myth of King Midas and his golden touch - Iseult Gillespie
 
05:05
Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-myth-of-king-midas-and-his-golden-touch-iseult-gillespie In Greek mythology, King Midas is known as a rogue ruler whose antics bemused his people and irritated the Gods. Many know the classic story of Midas's golden touch, but the foolish king was also known for his unusual pair of ears. Iseult Gillespie shares the myth of King Midas. Lesson by Iseult Gillespie, animation by TED-Ed. Thank you so much to our patrons for your support! Without you this video would not be possible! Milad Mostafavi, Rob Johnson, Singh Devesh Sourabh, Ashley Maldonado, Clarence E. Harper Jr., Bojana Golubovic, Mihail Radu Pantilimon, Sarah Yaghi, Benedict Chuah, Karthik Cherala, haventfiguredout , Violeta Cervantes, Elaine Fitzpatrick, Lyn-z Schulte, Sharon Chou, Henrique 'Sorín' Cassús, Tim Robinson, Kiarash Asar, Jun Cai, Paul Schneider, Amber Wood, Ophelia Gibson Best, Cas Jamieson, Michelle Stevens-Stanford, Phyllis Dubrow, Andreas Voltios, Aliyya Rachmadi, Eunsun Kim, Philippe Spoden, Samantha Chow, Armando Ello, Ayala Ron, Manognya Chakrapani, Simon Holst Ravn, Doreen Reynolds-Consolati, Rakshit Kothari, Melissa Sorrells, Antony Lee, Husain Mohammad, Dino Hrnjić, Max Shuai Tang, Côme Vincent, Astia Rizki Safitri, Alan Froese, alessandra tasso, Jamerson Chingapanini, Gerald Onyango, Dalton Valette, Katrina Harding, Ezgi Yersu, Al the Scottish Wildcat, Katie Dean, Kin Lon Ma, Carsten Tobehn, Boris Langvand, Jeremy Fryd, and Charlene You.
Views: 1521417 TED-Ed
Why are sloths so slow? - Kenny Coogan
 
05:15
View full lesson: http://ed.ted.com/lessons/why-are-sloths-so-slow-kenny-coogan Sloths spend most of their time eating, resting, or sleeping; in fact, they descend from their treetops canopies just once a week, for a bathroom break. How are these creatures so low energy? Kenny Coogan describes the physical and behavioral adaptations that allow sloths to be so slow. Lesson by Kenny Coogan, animation by Anton Bogaty.
Views: 1903733 TED-Ed
How do solar panels work? - Richard Komp
 
04:59
View full lesson: https://ed.ted.com/lessons/how-do-solar-panels-work-richard-komp The Earth intercepts a lot of solar power: 173,000 terawatts. That’s 10,000 times more power than the planet’s population uses. So is it possible that one day the world could be completely reliant on solar energy? Richard Komp examines how solar panels convert solar energy to electrical energy. Lesson by Richard Komp, animation by Globizco.
Views: 2099889 TED-Ed
How smart are dolphins? - Lori Marino
 
04:51
View full lesson: http://ed.ted.com/lessons/how-smart-are-dolphins-lori-marino Dolphins are one of the smartest animal species on Earth. In fact, their encephalization quotient (their brain size compared to the average for their body size) is second only to humans. But exactly how smart are they? Lori Marino details some incredible facts about dolphins. Lesson by Lori Marino, animation by Zedem Media.
Views: 1191366 TED-Ed
Why should you listen to Vivaldi's "Four Seasons"? - Betsy Schwarm
 
04:20
View full lesson: http://ed.ted.com/lessons/why-should-you-listen-to-vivaldi-s-four-seasons-betsy-schwarm Light, bright, and cheerful, "The Four Seasons" by Antonio Vivaldi is some of the most familiar of all early 18th century music, featured in numerous films and television commercials. But what is its significance, and why does it sound that way? Betsy Schwarm uncovers the underlying narrative of this musical masterpiece. Lesson by Betsy Schwarm, animation by Compote Collective.
Views: 1998412 TED-Ed
Einstein's miracle year - Larry Lagerstrom
 
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View full lesson here: http://ed.ted.com/lessons/einstein-s-miracle-year-larry-lagerstrom As the year 1905 began, Albert Einstein faced life as a “failed” academic. Yet within the next twelve months, he would publish four extraordinary papers, each on a different topic, that were destined to radically transform our understanding of the universe. Larry Lagerstrom details these four groundbreaking papers. Lesson by Larry Lagerstrom, animation by Oxbow Creative.
Views: 983291 TED-Ed
Can you solve the locker riddle? - Lisa Winer
 
03:50
View full lesson: http://ed.ted.com/lessons/can-you-solve-the-locker-riddle-lisa-winer Your rich, eccentric uncle just passed away, and you and your 99 nasty relatives have been invited to the reading of his will. He wanted to leave all of his money to you, but he knew that if he did, your relatives would pester you forever. Can you solve the riddle he left for you and get the inheritance? Lisa Winer shows how. Lesson by Lisa Winer, animation by Artrake Studio.
Views: 5989144 TED-Ed
Why do people join cults? - Janja Lalich
 
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View full lesson: http://ed.ted.com/lessons/why-do-people-join-cults-janja-lalich Today, there are thousands of cults around the world. Broadly speaking, a cult is a group or movement with a shared commitment to a usually extreme ideology that’s typically embodied in a charismatic leader. But what exactly differentiates cults from other groups – and why do people join them? Janja Lalich describes how cults recruit and manipulate their members. Lesson by Janja Lalich, animation by Globizco.
Views: 1663289 TED-Ed
The Infinite Hotel Paradox - Jeff Dekofsky
 
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Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/the-infinite-hotel-paradox-jeff-dekofsky Want more? Try to solve the buried treasure riddle: https://www.youtube.com/watch?v=tCeklW2e6_E The Infinite Hotel, a thought experiment created by German mathematician David Hilbert, is a hotel with an infinite number of rooms. Easy to comprehend, right? Wrong. What if it's completely booked but one person wants to check in? What about 40? Or an infinitely full bus of people? Jeff Dekofsky solves these heady lodging issues using Hilbert's paradox. Lesson by Jeff Dekofsky, animation by The Moving Company Animation Studio.
Views: 8984974 TED-Ed
How a wound heals itself - Sarthak Sinha
 
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View full lesson: http://ed.ted.com/lessons/how-a-wound-heals-itself-sarthak-sinha Our skin is the largest organ in our bodies, with a surface area of about 20 square feet in adults. When we are cut or wounded, our skin begins to repair itself through a complex, well-coordinated process. Sarthak Sinha takes us past the epidermis and into the dermis to investigate this regenerative response. Lesson by Sarthak Sinha, animation by Karrot Animation.
Views: 2752840 TED-Ed
The myth of Cupid and Psyche - Brendan Pelsue
 
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Check out TED-Ed's Patreon page! https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-myth-of-cupid-and-psyche-brendan-pelsue Psyche was born so beautiful that she was worshipped as a new incarnation of Venus, the goddess of love. But human lovers were too intimidated to approach her, and Apollo recommended her father abandon her on a crag where she would marry “a cruel and savage, serpent-like winged evil.” But Psyche’s story ended up being much more interesting. Brendan Pelsue shares the myth of Cupid and Psyche. Lesson by Brendan Pelsue, directed by TED-Ed.
Views: 2757971 TED-Ed
Football physics: The "impossible" free kick - Erez Garty
 
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View full lesson: http://ed.ted.com/lessons/football-physics-the-impossible-free-kick-erez-garty In 1997, Brazilian football player Roberto Carlos set up for a 35 meter free kick with no direct line to the goal. Carlos’s shot sent the ball flying wide of the players, but just before going out of bounds it hooked to the left and soared into the net. How did he do it? Erez Garty describes the physics behind one of the most magnificent goals in the history of football. Lesson by Erez Garty, animation by TOGETHER.
Views: 1594447 TED-Ed
What does the liver do? - Emma Bryce
 
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View full lesson: http://ed.ted.com/lessons/what-does-the-liver-do-emma-bryce There’s a factory inside you that weighs about 1.4 kilograms and runs for 24 hours a day. It’s your liver: the heaviest organ in your body, which simultaneously acts as a storehouse, a manufacturing hub, and a processing plant. Emma Bryce gives a crash course on the liver and how it helps keep us alive. Lesson by Emma Bryce, animation by Andrew Zimbelman for The Foreign Correspondents' Club.
Views: 934409 TED-Ed
How stress affects your brain - Madhumita Murgia
 
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Check out our Patreon page: https://www.patreon.com/teded View full lesson: http://ed.ted.com/lessons/how-stress-affects-your-brain-madhumita-murgia Stress isn’t always a bad thing; it can be handy for a burst of extra energy and focus, like when you’re playing a competitive sport or have to speak in public. But when it’s continuous, it actually begins to change your brain. Madhumita Murgia shows how chronic stress can affect brain size, its structure, and how it functions, right down to the level of your genes. Lesson by Madhumita Murgia, animation by Andrew Zimbelman.
Views: 2269621 TED-Ed