From our friends at Futility Closet:
Fit two identical 90-degrees cones base to base, slice the resulting shape in half vertically, and give one of the halves a quarter turn. The result is a sphericon, a solid that rolls with a bemusing meander: Where the original double cone rolls only in circles, the sphericon puts first one conical sector and then the other in contact with a flat surface beneath it, giving it a smooth but undulating trajectory sustained by a fixed center of mass.
And that’s just the start. “Two sphericons placed next to each other can roll on each other’s surfaces,” writes David Darling in The Universal Book of Mathematics. “Four sphericons arranged in a square block can all roll around one another simultaneously. And eight sphericons can fit on the surface of one sphericon so that any one of the outer solids can roll on the surface of the central one.”
I’ve been a paying member of Skillshare for a few years. It’s $10 a month and I’m able to watch unlimited instructional videos on a wide range of topics – programming, data science, Photoshop, photography, and tons of others. The Adobe After Effects instructional classes were very helpful in teaching me how to make my […]
Yesterday, Sherry Huss, former Maker-in-Chief of Maker Media, did a Facebook post about a new magazine, Reinvented, which has just released its second issue. The magazine, available in both print and digital formats, is written about women in STEM (Science Technology Engineering Math) by women in STEM.
From old-school bOING bOING editor Gareth Branwyn’s must-read e-newsletter “Gareth’s Tips, Tools, and Shop Tales”: I love The History Guy on YouTube. In this episode, he examines the history of the screwdriver and how world events shaped the development of the Phillips head and Robertson head drivers and screws. Even if you know something about […]
The latest iPhone cameras are undeniably impressive, but they’re still no match for a professional camera when it comes to taking clear, wide-angle shots. These six accessories will transform your iPhone into a pro-level camera in seconds, thanks to powerful and easy-to-attach lenses. 1. Lemuro 18MM iPhone Wide Lens MSRP: $100 | Sale Price: $80 […]
Few things in life are more universally dreaded than going to the gym, which is unfortunate since a new year usually means making new resolutions to get in shape. Thankfully, this BodyBoss 2.0: Portable Home Gym has everything you need to burn fat and build muscle in the comfort of your own home. With just […]
If one of your New Year’s resolutions is to travel more, you owe it to yourself to learn the language of the place you’re visiting. If you’re not sure where to start, give these resources a look. From mobile apps to online courses, these products can get you conversant in a new language before you […]