TED-Ed

Chemist Lee Cronin is working on a 3D printer that, instead of objects, is able to print molecules. An exciting potential long-term application: printing your own medicine using chemical inks. Talk by Lee Cronin. Learn more about your ad choices. Visit megaphone.fm/adchoices

Thomas Jefferson was a founding father of the United States — but were his principles outweighed by his participation in slavery?--Thomas Jefferson, founding father of the United States and primary author of the Declaration of Independence, was part of America’s fight for freedom and equality. But in his personal life, he held over 600 people in slavery. Are his enlightened principles outweighed b...

Explore how scientists define adulthood, and find out if there’s a specific age at which we reach maturity. --Most countries recognize 18 as the start of adulthood by granting various freedoms and privileges. Yet there’s no exact age or moment in development that we can point to as having reached full maturity. If there’s no consensus on exactly when we reach maturity, when do we actually become a...

Download a free audiobook version of “Into Thin Air“ and support TED-Ed's nonprofit mission: https://www.audible.com/ted-ed--It’s a bustling day in Pompeii. After a quick visit to the market, Fabia spots her brothers, Lucius and Marcus, crossing the Forum. The siblings begin discussing Lucius’ wedding — but a deafening boom interrupts them. They watch Vesuvius spew smoke, ash, and rock — and reali...

View full lesson: http://ed.ted.com/lessons/mysteries-of-vernacular-earwig-jessica-oreck-and-rachael-teelAn earwig is neither an ear nor a wig; it is an insect. Jessica Oreck and Rachael Teel explain how folklore gave this bug its name, combining entomology with etymology. Lesson by Jessica Oreck and Rachael Teel, animation by Jessica Oreck. Learn more about your ad choices. Visit megaphone.fm/adc...

With the same humor and humanity he exuded in An Inconvenient Truth, Al Gore spells out 15 ways that individuals can address climate change immediately, from buying a hybrid to inventing a new, hotter "brand name" for global warming. Talk by Al Gore. Learn more about your ad choices. Visit megaphone.fm/adchoices

Explore the gruesome evolutionary strategy employed by parasitoid wasps where they feed off other animals to grow their offspring.--A cockroach and jewel wasp are locked in battle. The wasp latches onto the cockroach and inserts her stinger into the cockroach's brain, where her venom blocks its fight-or-flight response. Now, the cockroach is essentially a zombie, and its carcass will be used to gr...

Dig into the psychology of why rejection causes us pain, and explore strategies to cope with this common experience.--Rejection hurts. It’s incredibly painful to feel like you’re not wanted — and we do mean painful. Researchers found that we relate rejection to being “hurt,” using terms like “crushed” or “broken-hearted.” So, why does rejection trigger such a strong response, and is there any way...

View full lesson: http://ed.ted.com/lessons/how-giant-sea-creatures-eat-tiny-sea-creatures-kelly-benoit-birdIt's a paradox of ocean life: The largest mammals, like dolphins and whales, survive on the tiniest food, like krill. (Picture trying to make a full meal out of flying kernels of popcorn!) So how do these big animals gather enough food to live? At TEDYouth 2012, Kelly Benoit-Bird discusses n...

Practice more problem-solving at https://brilliant.org/TedEd--The fabled Mirzakhani wand is the most powerful magical item ever created. And that’s why the evil wizard Moldevort is planning to use it to conquer the world. You and Drumbledrore have finally discovered its hiding place in a cave, but the wand is hidden by a system of 100 magical stones. Can you figure out how to get to the wand befor...

Joshua Prince-Ramus believes that if architects re-engineer their design process, the results can be spectacular. In his talk, he walks us through his fantastic re-creation of the local Wyly Theater as a giant "theatrical machine" that reconfigures itself at the touch of a button. (Filmed at TEDxSMU.) Learn more about your ad choices. Visit megaphone.fm/adchoices

An insect's ability to fly is perhaps one of the greatest feats of evolution. Michael Dickinson looks at how a fruit fly takes flight with such delicate wings, thanks to a clever flapping motion and flight muscles that are both powerful and nimble. But the secret ingredient: the incredible fly brain. (Filmed at TEDxCaltech.) Talk by Michael Dickinson. Learn more about your ad choices. Visit megaph...

Explore how the technology of gene drives could lead to the eradication of mosquitoes and what that could mean for our ecosystems.--Mosquitoes are responsible for more human deaths every year than any other animal, but very few of the 3,500 mosquito species actually transmit deadly diseases to humans. Scientists have been conducting experiments using engineered technologies called gene drives that...

This is one of five student perspectives featured in the PBS special "TED Talks Education" (#TEDTalksed.) Learn more here: https://www.ted.com/promos/TEDTalksEducationSpecial thanks to our partners in this endeavor: WNET, PBS and the Corporation for Public Broadcasting. Learn more about your ad choices. Visit megaphone.fm/adchoices

Get to know the history of Juneteenth, a commemoration of the end of slavery in the United States after the Civil War.--At the end of the Civil War, though slavery was technically illegal in all states, it still persisted in the last bastions of the Confederacy. This was the case when Union General Gordon Granger marched his troops into Galveston, Texas on June 19th and announced that all enslaved...

Get to know the legacy of Hisako Koyama, whose drawings of the Sun’s surface helped scientists reconstruct 400 years of sunspot activity.--In 1944, amateur astronomer Hisako Koyama’s latest endeavor was sketching the Sun’s shifting surface. She spent weeks angling her telescope towards the Sun and tracking every change she saw with drawings. Little did she know, these drawings were the start of on...

This is one of five student perspectives featured in the PBS special "TED Talks Education" (#TEDTalksed.) Learn more here: https://www.ted.com/promos/TEDTalksEducationSpecial thanks to our partners in this endeavor: WNET, PBS and the Corporation for Public Broadcasting. Learn more about your ad choices. Visit megaphone.fm/adchoices

Get to know the story of David Walker, an abolitionist whose antislavery pamphlet made him an enemy of the US government.--In 1830, David Walker sewed a pamphlet into the lining of a coat. The volume was thin enough to be hidden, but its content was far from insubstantial. At the time, many members of the US government considered this pamphlet to be one of the most dangerous documents in American...

Is there a definitive line that divides crazy from sane? With a hair-raising delivery, Jon Ronson, author of The Psychopath Test, illuminates the gray areas between the two. (With live-mixed sound by Julian Treasure and animation by Evan Grant.)Talk by Jon Ronson. Learn more about your ad choices. Visit megaphone.fm/adchoices

Explore the physics of flight, and discover how aerodynamic lift generates the force needed for planes to fly.--By 1917, Albert Einstein had explained the relationship between space and time. But, that year, he designed a flawed airplane wing. His attempt was based on an incomplete theory of how flight works. Indeed, insufficient and inaccurate explanations still circulate today. So, where did Ein...

In this funny and insightful talk, builder Dan Phillips tours us through a dozen homes he's built in Texas using recycled and reclaimed materials in wildly creative ways. Brilliant, low-tech design details will refresh your own creative drive. (Filmed at TEDxHouston.)Talk by Dan Phillips. Learn more about your ad choices. Visit megaphone.fm/adchoices

In this short talk, TED Fellow Sarah Parcak introduces the field of "space archeology" -- using satellite images to search for clues to the lost sites of past civilizations. Talk by Sarah Parcak. Learn more about your ad choices. Visit megaphone.fm/adchoices

Dig into the field of cryobiology and explore the possibility of humans being frozen and preserved for future resurrection.--In 1967, James Bedford had a plan to cheat death. He was the first person to be cryogenically frozen. This process promised to preserve his body until a theoretical future when humanity could cure any illness, and essentially, reverse death. So is it possible to freeze a hum...

Find out how a hatchetfish survives its daily journey from the depths of the ocean’s Twilight Zone to the resource-rich surface.--You’re traveling deep beneath the ocean’s surface, where faint lights flicker and toothy grins flash. Your mission is to survive these depths and journey to the surface after sundown to feed. And as a hatchetfish, almost every other deep-sea creature is trying to eat yo...

In her talk, Rachel Botsman says we're "wired to share" -- and shows how websites like Zipcar and Swaptree are changing the rules of human behavior. (Filmed at TEDxSydney.)Talk by Rachel Botsman. Learn more about your ad choices. Visit megaphone.fm/adchoices