SciShow
Why Are Plants Green Instead of Black?
Nothing says "nature" like a lush green forest. But why are plants green in the first place?
TED Talks
Matt Kenyon: A secret memorial for civilian casualties
In the fog of war, civilian casualties often go uncounted. Artist Matt Kenyon, whose recent work memorialized the names and stories of US soldiers killed in the Iraq war, decided he should create a companion monument, to the Iraqi...
TED Talks
TED: Get comfortable with being uncomfortable | Luvvie Ajayi
Luvvie Ajayi isn't afraid to speak her mind or to be the one dissenting voice in a crowd, and neither should you. "Your silence serves no one," says the writer, activist and self-proclaimed professional troublemaker. In this bright,...
TED Talks
Ueli Gegenschatz: Extreme wingsuit flying
Wingsuit jumping is the leading edge of extreme sports -- an exhilarating feat of almost unbelievable daring, where skydivers soar through canyons at over 100MPH. Ueli Gegenschatz talks about how (and why) he does it, and shows...
TED Talks
Stewart Brand + Mark Z. Jacobson: Debate: Does the world need nuclear energy?
Nuclear power: the energy crisis has even die-hard environmentalists reconsidering it. In this first-ever TED debate, Stewart Brand and Mark Z. Jacobson square off over the pros and cons. A discussion that'll make you think -- and might...
TED Talks
TED: Your body language may shape who you are | Amy Cuddy
(NOTE: Some of the findings presented in this talk have been referenced in an ongoing debate among social scientists about robustness and reproducibility. Read "Criticisms & updates" below for more details as well as Amy Cuddy's...
TED Talks
TED: Art in the age of machine intelligence | Refik Anadol
What does it look like inside the mind of a machine? Inspired by the architectural vision of a futuristic Los Angeles in "Blade Runner," media artist Refik Anadol melds art with artificial intelligence in his studio's collaborations with...
TED-Ed
TED-ED: How do executive orders work? - Christina Greer
On January 1, 1863, Abraham Lincoln legally changed the status of over 3 million people from "slave" to "free." But his emancipation proclamation wasn't a law - it was an executive order. The framers of the American Constitution made...
Crash Course
The Congress of Vienna: Crash Course European History
The end of the Napoleonic Wars left the great powers of Europe shaken. Judging from the destruction that had been wrought across the continent, it seemed to the powers that be that the Enlightenment had liberated the people, and led to...
MinutePhysics
The Most Burly Hurls
Which is the most intense Olympic throwing event? Shot put? Hammer? Discus? Javelin?
SciShow
Interview with EPA Administrator McCarthy
Hank interviews Administrator Gina McCarthy of the United States Environmental Protection Agency. They discuss getting people to care about climate change, the EPA's goals going into the United Nations Climate Change Conference, and the...
Crash Course
Dutch Golden Age: Crash Course European History
While the English were falling apart a little, with their civil war and their restoration and their succession problems, the Dutch were getting their act together. They were throwing off the yoke of the Spanish Empire, uniting their...
SciShow
This Problem Could Break Cryptography
What if, no matter how strong your password was, a hacker could crack it just as easily as you can type it? In fact, what if all sorts of puzzles we thought were hard turned out to be easy? Mathematicians call this problem P vs. NP, it...
PBS
The Real Star Wars
Anti-Satellite weaponry, giant X-ray lasers and kinetic impact missiles nicknamed the "Rods from God." Find out about the history of the real star wars that have been waged over the past 50 years.
Crash Course
War and Civilization: Crash Course World History 205
In which John Green investigates war, and what exactly it may or may not be good for. Was war a result of human beings organizing into larger and more complex agricultural social orders, or did war maybe create agriculture and...
TED-Ed
TED-Ed: Can you solve the Ragnarok riddle? | Dan Finkel
Ragnarok: The fabled end of the world, when giants, monsters, and Norse gods battle for the future. The gods were winning until the great serpent Jörmungandr emerged. It swallowed Valhalla and contorted itself across the land. Odin has...
TED Talks
TED: A transparent, easy way for smallholder farmers to save | Anushka Ratnayake
A safe space to save money is life-changing -- especially for the 60 million smallholder farmers in West Africa (the majority being women) who often live on less than two dollars a day. Poverty fighter Anushka Ratnayake introduces her...
SciShow
Why Don't We Have Nuclear Fusion Power Yet?
Fusion power is supposed to save us from fossil fuels, so when is nuclear fusion going to be a viable option and why has it been so elusive?
TED-Ed
TED-ED: The life, legacy & assassination of an African revolutionary - Lisa Janae Bacon
In 1972, Thomas Sankara was swept into the revolution seeking to wrest control of Madagascar from France’s lingering colonial rule. The protests inspired the West African native to read works by socialist leaders and seek wisdom from...
TED Talks
Raul Midon: "Tembererana"
Singer/guitarist Raúl Midón performs "All the Answers" in a world premiere at TED2007, followed by the sprightly "Tembererana."
TED Talks
Raul Midon: "Peace on Earth"
Guitarist and singer Raul Midon plays "Everybody" and "Peace on Earth" during his 2007 set at TED.
TED Talks
Morley: "Women of Hope"
Inspired by Aung San Suu Kyi's call to action, "If you're feeling helpless, help someone," Morley composed this song. She sings it at TEDxWomen in her gorgeous, warm voice.
TED Talks
TED: How will we survive when the population hits 10 billion? | Charles C. Mann
By 2050, an estimated 10 billion people will live on earth. How are we going to provide everybody with basic needs while also avoiding the worst impacts of climate change? In a talk packed with wit and wisdom, science journalist Charles...
TED Talks
TED: How we can end sexual harassment at work | Gretchen Carlson
When Gretchen Carlson spoke out about her experience of workplace sexual harassment, it inspired women everywhere to take their power back and tell the world what happened to them. In a remarkable, fierce talk, she tells her story -- and...