How the Most Expensive Swords in the World Are Made
AdultsConstructionEducationHistoryArt... This is a video about how Japanese samurai swords, aka katanas, are made – from the gathering of the iron sand, to the smelting of the steel, to the forging of the blade.
Cardiologist Answers Heart Questions From Twitter
AdultsEducationHealthHuman Cardiologist Dr. Sunil Rao answers your questions about the heart from Twitter. How do you measure your maximum heart rate?
We're Probably Going to Cure MS
AdultsHealthHistoryScienceEducation... You've probably heard of multiple sclerosis, especially if you're a fan of The West Wing. But can we ever cure MS? Yes. But also, no. But also, probably? It's complicated.
Why Do All YouTube Videos Look Alike?
AdultsCreativityEducationMediaInternet CultureScience... Many crustaceans from all sorts of starting points evolve to end up looking similar, likely due to outside pressures. That’s sort of like what happens with YouTube videos.
The Paradox of an Infinite Universe
AdultsEducationScienceSpacePhilosophy... What is outside of the universe? We know that the universe had a beginning 14 billion years ago and that it has been expanding ever since.
3 Mysteries of the Universe
AdultsEducationScienceSpace We're still in the dark about what 95 percent of our universe is made of — and the standard model for understanding particle physics has hit a limit.
Counting Fire Trucks
KidsEducationMathMusic This catchy count to 10 song is perfect for teaching kids about fire trucks and counting!
Why Are All Humans Unique? Meiosis: Crash Course Biology
AdultsBiologyHumanScienceEducation... Ever wonder why we aren’t exact clones of our parents, or why siblings aren’t exactly alike? The reason traces back to meiosis. In this episode of Crash Course Biology, we’ll discover how egg and sperm cells get made and learn why you’re a totally unique remix of your parents’ DNA.
Ancient Animal Crossing
KidsAnimalsHistoryNatureEducation... Join Squeaks and Jessi as they learn about a time when lots of animals switched places -- like bears, sloths, armadillos, and more.
What's The Smallest Animal On Earth?
YouthAnimalsEducationScience Are you wondering: What's the smallest animal on Earth? This question came from Brady, a student from Canada.
Why Climbers Trust Rubber With Their Lives
AdultsEducationLifeScienceEngineering... Why is rubber so “sticky”? Why does rubber consistently have one of the highest coefficients of friction?