Web Originals : Ask History: Who Really Invented the Airplane? | History
AdultsConstructionCreativityHistoryTheir flight at Kitty Hawk made history, but did the Wright brothers invent the first airplane?
How An Infinite Hotel Ran Out Of Room
AdultsCreativityEducationLife...If there's a hotel with infinite rooms, could it ever be completely full? Could you run out of space to put everyone? The surprising answer is yes -- this is important to know if you're the manager of the Hilbert Hotel.
TRUE Limits Of Humanity – The Final Border We Will Never Cross
AdultsEducationHumanLifeIs there a border we will never cross? Are there places we will never reach, no matter how hard we try? It turns out, there are. Even with sci-fi technology, we are trapped in a limited pocket of the Universe and the finite stuff within it. How much universe is there for us and how far can we go?
How one design flaw almost toppled a skyscraper - Alex Gendler
AdultsCitiesConstructionHistory...Dig into the unique engineering of New York City’s Citicorp Center tower, and the design flaw that threatened to topple it.
This Unstoppable Robot Could Save Your Life
AdultsConstructionCreativityScience...This robot has applications to archaeology, space exploration, and search and rescue — with a simple elegant design inspired by a plant.
How do wind turbines work?
AdultsNatureScienceTechnology...Explore how wind turbines convert wind into electricity, and the challenges of powering the world entirely with wind energy.
New Feature - Release Exercise Answers
TeachersTeacher CafeEducationExercise answers are now hidden from the students by default. You can release the answers at any time by clicking on this icon.
New Feature - Share Exercises with Multiple Classes
TeachersTeacher CafeEducationTeachers can now share an exercise with multiple classes at once.
This is why we can't have nice things
AdultsEducationLifeTechnology...This video is about stuff: light bulbs, printers, phones and why they aren't better.