When this curious contraption is switched on, an inner circle of white balls appears to be rolling inside the outer circle, but that's actually not the case at all. Below is a video explaining this circular motion illusion. Learn more about the mathematics behind it, specifically Copernicus’ Theorem, and the ingenious hypocycloid mechanical gear design by Girolamo Cardano (1501-1576) over at The Kid Should See This.
TheBackyardScientist built out a 200 watt laser and mounted it on the roof of his car. In his YouTube description, he wrote three paragraphs about why this experiment did not endanger any airplanes. Previously, he built a handheld 40 watt laser blaster:
Three years ago, Ian Davis was diagnosed with a cancer that weakens the bones. Shortly after, the engineer had an accident in his machine shop that resulted in physicians amputating four fingers on his dominant hand. “When I was still in the hospital I started designing a prosthetic hand,” Davis told KOBI News last year. […]
With everybody cooped up inside right now, it’s no surprise that many houses are starting to get a little bit…well, funky. Yeah…they smell. With everybody running around and sweating and working and cooking and everything else, odors get trapped inside your home. And don’t even get us started on what happens when litter boxes and […]
If you’re a big fan of ink, but not such a big fan of the forever side to tattoo body art or the pain, the Prinker S Temporary Tattoo Printer might just be your favorite creation of the century. Winner of 2020 Red Dot and If Design awards, the Prinker S is kind of like […]
If you want to understand what it takes to keep a company’s computer network happy and healthy in the cloud, the training found in The Complete AWS eBook and Video Course Bundle can go a long way toward making sure you know the ins and outs of the AWS environment. This bundle brings together five […]