Veritasium visited Dr. Stephen Steiner at Aerogel Technologies in Massachusetts to learn about the wonders of silica aerogel, a solid that is only twice as dense as air. My sister gave me a small chunk of aerogel about 10 years ago and it's one of my favorite possessions.
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11:46 am Mon
Jun 3, 2019
How aerogel is made and why it's so cool
How neural networks work – A good explainer video
How does a neural network connect perceptions to concepts? In other words, how can you make something that accepts an array of pixels as an input and correctly outputs "dog" or "cat?" This video from Art of the Problem does a good job of explaining how neural networks are able to do this, and why […]
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What does a fan do in a vacuum chamber?
In this video of The Action Lab, the Action Man puts a small fan into a vacuum chamber and pours a bunch of little styrofoam beads in it. At atmospheric pressure the beads fly all over the place. As he reduces the pressure inside a vacuum chamber, the beads slow down and eventually stop moving. […]
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Big Clive examines a fake UV disinfection lamp sold on eBay
YouTuber Big Clive bought a "UV disinfection lamp" on eBay. He tested it first by turning it on and aiming it at the back of his hand for a few seconds and then sniffing his hand for "skin damage." There was no odor, which was a good sign that it's not really producing UV-C radiation, […]
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If you've ever thought of learning American Sign Language, this masterclass is the way to go
One million Americans use American Sign Language as their primary means of communication. But as you'd expect, even though ASL is the sixth-most used language in the US, it isn't just any old language like English or Spanish or French. According to Communication Service for the Deaf, 98 percent of Deaf people don't receive education […]
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Fluster is the social card game that can immediately make game night unforgettable
After a successful round of funding on Kickstarter, Fluster: The Social Card Game is now ready to help turn a party or game night into the engaging, surprising, and enlightening social affair you always hoped it would be. A deck of 100 cards, Fluster is chock full of unusual, funny, and thought-provoking questions inspired to […]
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Brush up on the physics lessons you learned in high school with this $10 training class
Physics may have been that class you sleepwalked your way through in high school. But while it might have just slipped under your radar throughout your academic career, you probably shouldn't have given it such shallow attention. Sure, we could focus on the immediate pluses of a career as a physicist, like the more than […]
