Crash Course
Intro to Algorithms: Crash Course Computer Science
Algorithms are the sets of steps necessary to complete computation - they are at the heart of what our devices actually do. And this isn’t a new concept. Since the development of math itself algorithms have been needed to help us...
PBS
What was Fermat's "Marvelous" Proof?
If Fermat had a little more room in his margin, what proof would he have written there?
Crash Course
The Civil War Part 2 Crash Course US History
In which John Green teaches you how the Civil War played a large part in making the United States the country that it is today. He covers some of the key ways in which Abraham Lincoln influenced the outcome of the war, and how the lack...
TED-Ed
TED-ED: The chemical reaction that feeds the world - Daniel D. Dulek
How do we grow crops quickly enough to feed the Earth's billions? It's called the Haber process, which turns the nitrogen in the air into ammonia, easily converted in soil to the nitrate plants need to survive. Though it has increased...
Crash Course
Solutions: Crash Course Chemistry
This week, Hank elaborates on why Fugu can kill you by illustrating the ideas of solutions and discussing molarity, molality, and mass percent. Also, why polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar...
TED-Ed
TED-Ed: The Factory | Think Like A Coder, Ep 9 | Alex Rosenthal
This is episode 9 of our animated series "Think Like A Coder." This 10-episode narrative follows a girl, Ethic, and her robot companion, Hedge, as they attempt to save the world. The two embark on a quest to collect three artifacts and...
SciShow Kids
Animal Tricksters!
Have you ever pretended to be something else? Some animals do too! Learn how animals use mimicry to keep safe, or to sneak a snack!
Crash Course
The Century of the Gene: Crash Course History of Science
With the question “What is life?” addressed at the molecular level, humanity could finally cure all disease and live forever… Except, not really. It turns out we're complicated.
Crash Course
Ragnarok: Crash Course World Mythology
Ragnarok! It's the end of the world, Norse style. It's got everything you want in an apocalypse. Earthquakes, destruction, armies of the dead, a giant evil wolf, giants with flaming swords, and a kind of happy ending. It's got it all....
Crash Course
Blood, Part 2 - There Will Be Blood: Crash Course A&P
It's time to start talking about some of the terrible things you can do to your own body, like blood doping. We'll start by explaining the structure and function of your erythrocytes, and of hemoglobin, which they use to carry oxygen....
SciShow
5 Periodic Tables We Don't Use (And One We Do)
From Mendeleev’s original design to physicist-favorite “left-step” rendition, the periodic table of elements has gone through many iterations since it was first used to organize elements 150 years ago - each with its own useful insights...
SciShow
4 Ways to Date an Archaeological Site
From wasps nests to nuclear reactors. Here are just a few clever ways archeologists figure out how old something is.
TED Talks
TED: A tailored history of who wears what -- and why | Richard Thompson Ford
From puffy trousers to pantsuits and everything in between, law professor and author Richard Thompson Ford takes us on a fascinating tour through the history of fashion and the evolution of dress codes that still influence style today,...
Crash Course
Community Ecology: Feel the Love - Crash Course Ecology
Interactions between species are what define ecological communities, and community ecology studies these interactions anywhere they take place. Although interspecies interactions are mostly competitive, competition is pretty dangerous,...
TED Talks
TED: Two nerdy obsessions meet -- and it's magic | David Kwong
David Kwong is a magician who makes crossword puzzles -- in other words, a pretty nerdy guy. And for his next trick ...
TED Talks
TED: Why I make robots the size of a grain of rice | Sarah Bergbreiter
By studying the movement and bodies of insects such as ants, Sarah Bergbreiter and her team build incredibly robust, super teeny, mechanical versions of creepy crawlies … and then they add rockets. See their jaw-dropping developments in...
Crash Course
Reader, it's Jane Eyre - Crash Course Literature 207
In which John Green teaches you about Charlotte Bronte's classic coming of age novel, Jane Eyre. Look, we don't like to make judgement values here, but Jane Eyre is awesome. By which we mean the book is great, and the character is...
TED-Ed
TED-ED: The myth behind the Chinese zodiac - Megan Campisi and Pen-Pen Chen
What's your sign? In Western astrology, it's a constellation determined by when your birthday falls in the calendar. But according to the Chinese zodiac (__), it's your shuxiang, meaning the animal assigned to your birth year. And of the...
SciShow
How to Make Snow (If You're Not Elsa)
In this episode Hank explains how snow is made using science.
Crash Course
P-Hacking - Crash Course Statistics
Today we're going to talk about p-hacking (also called data dredging or data fishing). P-hacking is when data is analyzed to find patterns that produce statistically significant results, even if there really isn't an underlying effect,...
TED Talks
TED: 5 ways to listen better | Julian Treasure
In our louder and louder world, says sound expert Julian Treasure, "We are losing our listening." In this short, fascinating talk, Treasure shares five ways to re-tune your ears for conscious listening -- to other people and the world...
TED-Ed
TED-ED: Everything you need to know to read Homer's "Odyssey" - Jill Dash
An encounter with a man-eating giant. A sorceress who turns men into pigs. A long-lost king taking back his throne. On their own, any of these make great stories. But each is just one episode in the "Odyssey," a 12,000-line poem spanning...
TED-Ed
TED-ED: How computer memory works - Kanawat Senanan
In many ways, our memories make us who we are, helping us remember our past, learn and retain skills, and plan for the future. And for the computers that often act as extensions of ourselves, memory plays much the same role. Kanawat...
Crash Course
2,000 Years of Chinese History! The Mandate of Heaven and Confucius World History
In which John introduces you to quite a lot of Chinese history by discussing the complicated relationship between the Confucian scholars who wrote Chinese history and the emperors (and empress) who made it. Included is a brief...