TED-Ed

Nearly 450 million people are affected by mental illness worldwide. In wealthy nations, just half receive appropriate care, but in developing countries, close to 90 percent go untreated because psychiatrists are in such short supply. Vikram Patel outlines a highly promising approach -- training members of communities to give mental health interventions, empowering ordinary people to care for other...

Dig into the history of pandemics to learn how viruses and disease spreads and what we can do to stop future outbreaks.--In our increasingly globalized world, a single infected person can board a plane and spread a virus across continents. Mark Honigsbaum describes the history of pandemics and how that knowledge can help halt future outbreaks. Lesson by Mark Honigsbaum, directed by Patrick Blower....

Explore the technique known as the Socratic Method, which uses questions to examine a person’s values, principles, and beliefs. --Socrates, one of the founding fathers of Western philosophical thought, was on trial. Many believed he was an enemy of the state, accusing the philosopher of corrupting the youth and refusing to recognize their gods. But Socrates wasn’t feared for claiming to have all t...

Take a look at 3 English language grammar rules to find out where they come from and if you actually need to follow them.--Grammatical rules have caused heated debate in various regions and languages for centuries. But while we know people take grammar seriously, what’s less clear is, why? Where do these seemingly random rules come from, and which, if any, actually matter? Arika Okrent takes a clo...

In the deepest, darkest parts of the oceans are ecosystems with more diversity than a tropical rainforest. Taking us on a voyage into the ocean -- from the deepest trenches to the remains of the Titanic -- marine biologist David Gallo explores the wonder and beauty of marine life. Learn more about your ad choices. Visit megaphone.fm/adchoices

We all use our body on a daily basis, and yet few of us think about our physicality the way Wayne McGregor does. He demonstrates how a choreographer communicates ideas to an audience, working with two dancers to build phrases of dance, live and unscripted, on the TEDGlobal stage. Talk by Wayne McGregor. Learn more about your ad choices. Visit megaphone.fm/adchoices

Explore how snakes evolved, and find out how their jaw-dropping anatomy allows them to take down prey several times their size.--Since slithering onto the scene some 150 million years ago, evolving length and limbless-ness out of their ancestral lizard forms, snakes have diversified rapidly. Their noodly bodies and flexible heads granted them access to novel places and prey. And today, there are n...

Practice more problem-solving at https://brilliant.org/TedEd--Bad news: your worst enemies are at the gate. Your fledgling kingdom guards the world’s only herd of tiny dino creatures. To you, they’re sacred. To everyone else, they’re food. The three closest nation-states have teamed up to smash open your walls and devour the herd. Can you build fortifications for your kingdom before the siege weap...

Stand by for an animated exploration of the famous Fermi Paradox. Given the vast number of planets in the universe, many much older than Earth, why haven't we yet seen obvious signs of alien life? The potential answers to this question are numerous and intriguing, alarming and hopeful. Learn more about your ad choices. Visit megaphone.fm/adchoices

TED-Ed's mission is to capture and amplify the voices of great educators around the world. We do this by pairing extraordinary educators with talented animators to produce a new library of curiosity-igniting videos. You can nominate a teacher, nominate an animator or suggest a lesson here: http://education.ted.comSubscribe to http://www.youtube.com/user/TEDEducation Learn more about your ad choice...

Dig into how the simple game of peek-a-boo contributes to babies developing their cognitive, motor, and social skills.--In Italy, it’s called il gioco del cucù. Palestinians say ba' 'éno. And in Japan, it’s inaīnaibā! Peek-a-boo is a near universal source of laughter and connection for infants and adults— it’s the first game that almost everyone plays. So what is it about this goofy game that babi...

In this wide-ranging, thought-provoking talk, Kevin Kelly muses on what technology means in our lives -- from its impact at the personal level to its place in the cosmos. (Filmed at TEDxAmsterdam.)Talk by Kevin Kelly. Learn more about your ad choices. Visit megaphone.fm/adchoices

In the first of a new TED-Ed series designed to catalyze curiosity, TED Curator Chris Anderson shares his boyhood obsession with quirky questions that seem to have no answers. Learn more about your ad choices. Visit megaphone.fm/adchoices

Learn more at https://brilliant.org/TedEd--Scanning the crime scene, Officer Stone sees a disorderly room, visible red-brown stains and a partial shoe track— all hinting at a bloody struggle. After calling in a team to inspect, photograph, sketch, measure, and collect all the evidence, the investigators apply Luminol. So, what is Luminol and why is it used at crime scenes? Theodore E. Yeshion shin...

Discover what causes acid rain, and how scientists were able to largely eliminate this major environmental threat. --In 1963, scientists studying Hubbard Brook Experimental Forest made a shocking discovery. Their most recent rainfall samples were nearly 100 times more acidic than usual; which could destroy the area’s ecosystems in a matter of decades. What was causing this deadly rainfall? And wha...

Wael Ghonim is the Google executive who helped jumpstart Egypt's democratic revolution ... with a Facebook page memorializing a victim of the regime's violence. Speaking at TEDxCairo, he tells the inside story of the past two months, when everyday Egyptians showed that "the power of the people is stronger than the people in power."Talk by Wael Ghonim. Learn more about your ad choices. Visit megaph...

Why aren’t commercial flights getting faster? Dig into the technological and environmental problems facing supersonic flight. --In 1996, a British Airways plane flew from New York to London in a record-breaking two hours and fifty-three minutes. Today, however, passengers flying the same route can expect to spend no less than six hours in the air — twice as long. So why, in a world where everythin...

In her talk, longtime English teacher Patricia Ryan asks a provocative question: Is the world's focus on English preventing the spread of great ideas in other languages? (For instance: what if Einstein had to pass the TOEFL?) It's a passionate defense of translating and sharing ideas. (Filmed at TEDxDubai.)Talk by Patricia Ryan. Learn more about your ad choices. Visit megaphone.fm/adchoices

Find out whether a honeybee, a tarantula hawk wasp, or a bullet ant has the most painful insect sting, and what each of their stings feel like. --One of these three creatures is thought to possess the world’s most painful insect sting: there’s an ant that forages in rainforest canopies, a bee that protects a hive of delectable honey, and a wasp that paralyzes tarantulas. So which has the nastiest...

View full lesson: http://ed.ted.com/lessons/the-terrors-of-sleep-paralysis-ami-angelowiczImagine you're fast asleep and then suddenly awake. You want to move but can't, as if someone is sitting on your chest. And you can't even scream! This is sleep paralysis, a creepy but common phenomenon caused by an overlap in REM sleep and waking stages. Ami Angelowicz describes just how pervasive (but harmle...

Discover the engineering innovations that made building Burj Khalifa, the world’s tallest skyscraper, possible.--In 2004, construction began on a new building in Dubai, promising a revolutionary design that would dwarf the rest of the world’s skyscrapers. Five years later, the 828-meter Burj Khalifa was complete, surpassing the previous record-holder by over 60%. What innovations allowed for such...

View full lesson: http://ed.ted.com/lessons/what-s-below-the-tip-of-the-iceberg-camille-seamanIt's a well-known fact that the majority of an iceberg lies below the surface -- but just as stealthily hidden are their fascinating qualities. Traveling the seas, teeming with life, and sometimes even making a noise called "bergie seltzer," there's so much more than meets the eye. Camille Seaman gives ho...

Explore the circular reasoning fallacy, which occurs when the end of an argument comes back to the start without having proven itself.--It’s 1990. A prospective student has filed a complaint about Virginia Military institute’s admissions policy that excludes women. The state argues that VMI’s single sex education is an “important governmental objective” and that the exclusion of women from VMI is...

Get to know the story of how truck driver Malcom McLean invented the shipping container, and how it transformed the global economy.--Sometimes a single unlikely idea can have massive impact across the world. Sir Harold Evans, the author of "They Made America," describes how frustration drove Malcom McLean, a small-town truck driver, to invent the shipping container. Containerization was born, and...

Explore 3 strategies to control the flow of lava, and how scientists are using them to protect communities from future eruptions.--In December 2023, Icelandic citizens experienced their worst nightmare: a volcanic fissure opened and began spewing lava fountains 100 meters tall. While the molten rock narrowly avoided a small town, Iceland wasn’t willing to leave anyone's fate to chance again and be...