How do wind turbines work?
AdultsNatureScienceTechnologyEnergyEnvironmentExplore how wind turbines convert wind into electricity, and the challenges of powering the world entirely with wind energy.
This Unstoppable Robot Could Save Your Life
AdultsConstructionCreativityScienceTechnologyThis robot has applications to archaeology, space exploration, and search and rescue — with a simple elegant design inspired by a plant.
Whatever happened to acid rain? - Joseph Goffman
AdultsHistoryLifeNatureEnvironmentScienceGlobal WarmingDiscover what causes acid rain, and how scientists were able to largely eliminate this major environmental threat.
New Feature - Share Exercises with Multiple Classes
TeachersTeacher CafeEducationTeachers can now share an exercise with multiple classes at once.
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.
This is why we can't have nice things
AdultsEducationLifeTechnologyHumorThis video is about stuff: light bulbs, printers, phones and why they aren't better.
Why "Nothing" Matters in Science
AdultsData ScienceMathScienceNull results often get a bad rap, sometimes characterized as a study "finding nothing," but there's a lot we can learn from studies whose results fail to support their hypotheses.
What’s the best fuel for your car?
AdultsAutomotiveNatureScienceEnergyEnvironmentTransportationDig into which fuel— gasoline, electric, biofuels, or electrofuels— is both affordable for consumers and sustainable for the planet.
How much land does it take to power the world?
AdultsIndustryTechnologyWorldEnergyEnvironmentExplore the sustainability of fossil fuels, nuclear power, and renewable energy and how much space each of these power sources use.