TED-Ed

Explore how the pancreas operates, and how this organ helps with digestion and controlling your sugar levels. Uploaded 19-02-15--Beneath your ribs, you’ll find, among other things, the pancreas -- an organ that works a lot like a personal health coach. Emma Bryce explains how this organ controls your sugar levels and produces a special juice that releases the nutrients from your food to help keep...

Check out our Patreon page: https://www.patreon.com/tededUploaded 21-06-18View full lesson: https://ed.ted.com/lessons/how-do-your-hormones-work-emma-bryceOver our lifetimes, our bodies undergo a series of extraordinary metamorphoses: we grow, experience puberty, and many of us reproduce. Behind the scenes, the endocrine system works constantly to orchestrate these changes. Emma Bryce explains how...

View full lesson: http://ed.ted.com/lessons/how-we-think-complex-cells-evolved-adam-jacobsonUploaded 17-02-15Imagine you swallowed a small bird and suddenly gained the ability to fly … or you ate a cobra and were able to spit poisonous venom! Well, throughout the history of life (and specifically during the evolution of complex eukaryotic cells) things like this happened all the time. Adam Jacobso...

Get informed on the science behind post-traumatic stress disorder, PTSD, its symptoms and how the brain reacts to trauma. Uploaded 25-06-18--Many of us will experience some kind of trauma during our lifetime. Sometimes, we escape with no long-term effects. But for millions of people, those experiences linger, causing symptoms like flashbacks, nightmares, and negative thoughts that interfere with e...

View full lesson: http://ed.ted.com/lessons/history-vs-richard-nixon-alex-gendlerUploaded 12-02-15The president of the United States of America is often said to be one of the most powerful positions in the world. But of all the US presidents accused of abusing that power, only one has left office as a result. Does Richard Nixon deserve to be remembered for more than the scandal that ended his pres...

Download a free audiobook version of "Hallucinations" and support TED-Ed's nonprofit mission: https://adbl.co/2Kpt43kUploaded 26-06-18Check out our full book recommendation: https://shop.ed.ted.com/products/hallucinationsView full lesson: https://ed.ted.com/lessons/what-causes-hallucinations-elizabeth-coxA condition called Charles Bonnet Syndrome can cause blind patients to hallucinate scenes in v...

View full lesson: http://ed.ted.com/lessons/what-causes-sonic-booms-katerina-kaouriUploaded 10-02-15Objects that fly faster than the speed of sound (like really fast planes) create a shock wave accompanied by a thunder-like noise: the sonic boom. These epic sounds can cause distress to people and animals and even damage nearby buildings. Katerina Kaouri details how scientists use math to predict s...

Practice more problem-solving at https://brilliant.org/TedEd/Uploaded 28-06-18Dutch artist Piet Mondrian’s abstract, rectangular paintings inspired mathematicians to create a two-fold challenge. Can you solve the puzzle and get to the lowest score possible? Gordon Hamilton shows how. Lesson by Gordon Hamilton, directed by Anton Trofimov. Thank you so much to our patrons for supporting us on Patreo...

Learn more about TED-Ed Clubs here: http://bit.ly/2z8YFSoUploaded 03-07-18View full lesson: https://ed.ted.com/lessons/are-there-universal-expressions-of-emotion-sophie-zadehThe 40 or so muscles in the human face can be activated in different combinations to create thousands of expressions. But do these expressions look the same and communicate the same meaning around the world regardless of cultu...

Explore how kidneys operate, and how this organ helps filter waste and excess fluid from your blood. Uploaded 09-02-15--After drinking a few glasses of water on a hot day, you might be struck with a sudden ... urge. Behind that feeling are two bean-shaped organs that work as fine-tuned internal sensors. Emma Bryce details how the incredible kidneys balance the amount of fluid in your body, detect...

Have you checked out our Patreon page? https://www.patreon.com/tededUploaded 05-07-18View full lesson: https://ed.ted.com/lessons/why-don-t-poisonous-animals-poison-themselves-rebecca-d-tarvinThousands of animal species use toxic chemicals to defend themselves from predators. Snakes have blood clotting compounds in their fangs, the bombardier beetle has corrosive liquid in its abdomen and jellyfis...

View full lesson: http://ed.ted.com/lessons/why-do-we-have-museums-j-v-marantoUploaded 05-02-15Museums have been a part of human history for over 2,000 years -- but they weren't always like the ones we visit today. J. V. Maranto uncovers the evolution of museums, from the first museum in 530 BC (curated by a princess) to PT Barnum’s freak shows and beyond. Lesson by J. V. Maranto, animation by Zed...

Check out our Patreon page: https://www.patreon.com/tededUploaded 10-07-18View full lesson: https://ed.ted.com/lessons/what-is-the-coldest-thing-in-the-world-lina-marieth-hoyosThe coldest materials in the world aren’t in Antarctica or at the top of Mount Everest. They’re in physics labs: clouds of gases held just fractions of a degree above absolute zero. Lina Marieth Hoyos explains how temperatur...

View full lesson: http://ed.ted.com/lessons/why-are-some-people-left-handed-daniel-m-abramsUploaded 03-02-15Today, about one-tenth of the world’s population are southpaws. Why are such a small proportion of people left-handed -- and why does the trait exist in the first place? Daniel M. Abrams investigates how the uneven ratio of lefties and righties gives insight into a balance between competitiv...

Check out our Patreon page: https://www.patreon.com/tededUploaded 12-07-18View full lesson: https://ed.ted.com/lessons/how-exactly-does-binary-code-work-jose-americo-n-l-f-freitasImagine trying to use words to describe every scene in a film, every note in a song, or every street in your town. Now imagine trying to do it using only the numbers 1 and 0. Every time you use the Internet to watch a mov...

View full lesson: http://ed.ted.com/lessons/how-do-dogs-see-with-their-noses-alexandra-horowitzUploaded 02-02-15You may have heard the expression that dogs ‘see with their noses.’ But these creature’s amazing nasal architecture actually reveals a whole world beyond what we can see. Alexandra Horowitz illustrates how the dog’s nose can smell the past, the future and even things that can’t be seen a...

Check out our Patreon page: https://www.patreon.com/tededUploaded 17-07-18View full lesson: https://ed.ted.com/lessons/history-vs-augustus-alex-gendler-and-peta-greenfieldHis reign marked the beginning of one of history’s greatest empires … and the end of one of its first republics. Was Rome’s first emperor a visionary leader who guaranteed his civilization’s place in history, or a tyrant who dest...

View full lesson: http://ed.ted.com/lessons/how-does-your-smartphone-know-your-location-wilton-l-virgoUploaded 29-01-15GPS location apps on a smartphone can be very handy when mapping a travel route or finding nearby events. But how does your smartphone know where you are? Wilton L. Virgo explains how the answer lies 12,000 miles over your head, in an orbiting satellite that keeps time to the beat...

Check out our Patreon page: https://www.patreon.com/tededUploaded 19-07-18View full lesson: https://ed.ted.com/lessons/a-day-in-the-life-of-an-ancient-egyptian-doctor-elizabeth-coxIt’s another sweltering morning in Memphis, Egypt. As the sunlight brightens the Nile, Peseshet checks her supplies. Honey, garlic, cumin, acacia leaves, cedar oil -- she’s well stocked with the essentials she needs to t...

View full lesson: http://ed.ted.com/lessons/why-shakespeare-loved-iambic-pentameter-david-t-freeman-and-gregory-taylorUploaded 27-01-15Shakespeare sometimes gets a bad rap in high schools for his complex plots and antiquated language. But a quick peek into the rhythm of his words reveals a poet deeply rooted in the way people spoke in his time — and still speak today. Why do Shakespeare’s words ha...

Take a closer look at the life of escaped slave and American icon Harriet Tubman, who liberated over 700 enslaved people using the Underground Railroad. Uploaded 24-07-18--Download a free audiobook version of "The Underground Railroad" and support TED-Ed's nonprofit mission: https://adbl.co/2LEl0sUCheck out our full book recommendation: https://shop.ed.ted.com/collections/ted-ed-book-recommendatio...

View full lesson: http://ed.ted.com/lessons/why-do-buildings-fall-in-earthquakes-vicki-v-mayUploaded 26-01-15Earthquakes have always been a terrifying phenomenon, and they’ve become more deadly as our cities have grown — with collapsing buildings posing one of the largest risks. But why do buildings collapse in an earthquake? And how can it be prevented? Vicki V. May explains the physics of why it...

Check out our Patreon page: https://www.patreon.com/tededUploaded 26-07-18View full lesson: https://ed.ted.com/lessons/how-can-you-change-someone-s-mind-spoiler-facts-don-t-work-so-well-hugo-mercierWhy do arguments change people’s minds in some cases and backfire in others? Hugo Mercier explains how arguments are more convincing when they rest on a good knowledge of the audience, taking into accou...

View full lesson: http://ed.ted.com/lessons/why-the-arctic-is-climate-change-s-canary-in-the-coal-mine-william-chapmanUploaded 22-01-15The Arctic may seem like a frozen and desolate environment where nothing ever changes. But the climate of this unique and remote region can be both an early indicator of the climate of the rest of the Earth and a driver for weather patterns across the globe. Willia...

If you enjoy this lesson, we highly recommend reading "Fallen Glory: The Lives and Deaths of History's Greatest Buildings." Discounted e-book versions available here: https://amzn.to/2LL50ZkUploaded 31-07-18Check out our book rec page to learn more: http://bit.ly/2mZ9LQSView full lesson: https://ed.ted.com/lessons/did-ancient-troy-really-exist-einav-zamir-dembinWhen Homer’s Iliad was first written...