Crash Course
Deep Time
As we approach the end of Crash Course Astronomy, it’s time now to acknowledge that our Universe’s days are numbered. Stars will die out after a few trillion years, protons will decay and matter will dissolve after a thousand trillion...
TED-Ed
TED-ED: How does impeachment work? - Alex Gendler
For most jobs, it's understood that you can be fired _ whether for crime, incompetence, or just poor performance. But what if your job happens to be the most powerful position in the country _ or the world? That's where impeachment comes...
Crash Course
Kinetics: Chemistry's Demolition Derby - Crash Course Chemistry
Have you ever been to a Demolition Derby? Then you have an idea of how molecular collisions happen. In this episode, Hank talks about collisions between molecules and atoms, activation energy, writing rate laws, equilibrium expressions,...
TED-Ed
TED-Ed: Why can't we see evidence of alien life? - Chris Anderson
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...
Crash Course
The History of Electrical Engineering: Crash Course Engineering #4
Next stop on our tour of engineering’s major fields: electrical engineering. In this episode we’ll explore the history of telecommunications, electric power and lighting, and computers. We’ll introduce topics like magnetism, electrical...
SciShow
Why Wouldn’t You Put Your Wind Farm In the Windiest Place?
Wind is an ever increasing source of power worldwide, which means wind farms continue to be constructed. And choosing where to place those farms seems straightforward, but it might not actually be best to place the in the windiest places!
SciShow
Get Charged Up for the Gigafactory
Hank shares the latest ambitious project from SpaceX and Tesla entrepreneur Elon Musk: The Gigafactory. Learn more about how batteries work, what the big deal is about lithium, and why people are getting so charged up. See what we did...
TED-Ed
TED-ED: The myth of Prometheus - Iseult Gillespie
Before the creation of humanity, the Greek gods won a great battle against a race of giants called the Titans. Most Titans were destroyed or driven to the eternal hell of Tartarus. But the Titan Prometheus, whose name means foresight,...
SciShow
Are Power Poses Super Life Hacks or Super Junk?
Your body language can communicate a lot of information to other people, but can striking a power pose revolutionize your life?
TED-Ed
TED-ED: The history of Tea - Shunan Teng
Tea is the second most consumed beverage in the world after water __ and from sugary Turkish Rize tea to salty Tibetan butter tea, there are almost as many ways of preparing the beverage as there are cultures on the globe. Where did this...
PBS
The Misunderstood Nature of Entropy
Entropy is surely one of the most intriguing and misunderstood concepts in all of physics. The entropy of the universe must always increase - so says the second law of thermodynamics. It's a law that seems emergent from deeper laws -...
SciShow
Is the Power Grid Ready for Green Energy?
Despite the rise of renewable energy, the backbone of the power grid is fossil fuels. Adapting the grid to green energy sources is more complicated than flipping a switch.
TED-Ed
TED-Ed: How is power divided in the United States government? - Belinda Stutzman
Articles I-III of the United States Constitution allow for three separate branches of government (legislative, executive, and judicial), along with a system of checks and balances should any branch get too powerful. Belinda Stutzman...
TED Talks
TED: How to make peace? Get angry | Kailash Satyarthi
How did a young man born into a high caste in India come to free 83,000 children from slavery? Nobel Peace Prize Laureate Kailash Satyarthi offers a surprising piece of advice to anyone who wants to change the world for the better: Get...
TED-Ed
TED-ED: Why should you read "Macbeth"? - Brendan Pelsue
There's a play so powerful that an old superstition says its name should never be uttered in a theater. A play that begins with witchcraft and ends with a bloody, severed head. A play filled with riddles, prophecies, nightmare visions,...
TED Talks
TED: An interactive map to track (and end) pollution in China | Ma Jun
China has pledged to be carbon neutral by 2060 -- and its citizens are helping industries across the country reach that goal. Environmentalist Ma Jun introduces the Blue Map, an app that empowers people to report pollution violations in...
TED-Ed
TED-Ed: A brief history of numerical systems - Alessandra King
1, 2, 3, 4, 5, 6, 7, 8, 9 and 0. With just these ten symbols, we can write any rational number imaginable. But why these particular symbols? Why ten of them? And why do we arrange them the way we do? Alessandra King gives a brief history...
Crash Course
Absolute Monarchy: Crash Course European History
So far, the rulers of Europe have been working to consolidate their power and expand their kingdoms, and this is it. The moment they've been working toward: Absolute Monarchy. We're going to learn about how kings and queens became...
Crash Course
Samurai, Daimyo, Matthew Perry, and Nationalism Crash Course World History
In which John Green teaches you about Nationalism. Nationalism was everywhere in the 19th century, as people all over the world carved new nation-states out of old empires. Nationalist leaders changed the way people thought of themselves...
SciShow
These 100-Million-Year-Old Microbes Are Still Alive!
Researchers have found ancient communities of microbes that have been buried deep, for a hundred million years! This discovery might be the oldest living thing on Earth, and could even expand the search for life on other planets.
TED Talks
TED: How India could pull off the world's most ambitious energy transition | Varun Sivaram
India has a historic opportunity to power its industrialization with clean energy -- and its energy choices will make or break the world's fight against climate change, says clean energy executive, physicist and author Varun Sivaram....
Crash Course
Thomas Jefferson & His Democracy Crash Course US History
In which John Green teaches you about founding father and third president of the United States, Thomas Jefferson. Jefferson is a somewhat controversial figure in American history, largely because he, like pretty much all humans, was a...
Crash Course
The Future of Clean Energy: Crash Course Engineering #31
This week we are exploring alternative energy sources. We'll look at how biomass can be burned as a fuel source, how hydrogen can be used in a fuel cell to generate electrical power, and how nuclear fission provides power to the grid....
TED Talks
TED: What it takes to make change | Jacqueline Novogratz
What can you do to build a better world? Sharing stories from her pioneering career dedicated to tackling poverty, Jacqueline Novogratz offers three principles to spark and sustain a moral revolution. Learn how you can commit (or...