Science & Technology Q&A for Kids (and others) [December 30, 2022]

Stephen Wolfram answers general questions from his viewers about science and technology as part of an unscripted livestream series, also available on YouTube here: https://wolfr.am/youtube-sw-qa Questions include: What causes snow? Why doesn't rain just turn into ice? - OK, Stephen really knows his stuff on this branch of physics... he's studied in detail. - Why is the density of solid water lower than liquid water? - Is there any other molecule that also expands when it is solid? - Why is the density of solid water lower than liquid water? - For ice skating, the ice melts at the contact of your blade so there is a small layer of liquid water due to friction, and hence it skates. - But you also can push and speed up on ice while skating, so an increase in the friction must have happened? - Apparently, gecko feet exhibit Casimir-like effects. - Stephen, if I may make a suggestion: you need a blackboard (or whiteboard) behind you for the explanations. - Is air a molecule? What is air? - Can you measure the absorption of CO2 by plants with this device?

Om Podcasten

Stephen Wolfram is the creator of Mathematica, Wolfram|Alpha and the Wolfram Language; the author of A New Kind of Science; and the founder and CEO of Wolfram Research. Over the course of nearly four decades, he has been a pioneer in the development and application of computational thinking—and has been responsible for many discoveries, inventions and innovations in science, technology and business. On his podcast, Stephen discusses topics ranging from the history of science to the future of civilization and ethics of AI.