The Hoberman Switch Pitch Throwing Ball is a $12 toy that instantiates a dual polyhedron: every time you throw it, it turns inside-out; there's a wealth of scientific literature that explains how this works, including this open-access paper from the Journal of the International Association for Shell and Spatial Structures. Here's JWZ's summary: "The curved body panels that make it look like a sphere hide an internal structure that is a cube; or really, two tetrahedrons embedded in a cube; and when it its its activation energy, the tetrahedron becomes its dual, swapping faces and vertices."
Inspired by the success of Judges' Guild, Kickstarter has launched Zine Quest, a challenge to crowdfund an RPG-themed zine ("must either contain an RPG or feature RPG-related content like maps, adventures, monsters, comics, articles, interviews, etc."); there's an impressive array of entrants already.
Volante Design (previously) has two new pieces: the Augment blazer and jacket, shipping on March 15 and available for pre-order today (Vest, $195: Men/Women; Blazer, $270: Men/Women), in men's sizes 37-51 (vest also in 55) and women's sizes 33-45.
One genre of 19th Cen illustrated pamphlet was the "Cries of London" (previously), which celebrated the market traders' characteristic sales patter, which were catalogued as a kind of urban birdsong.
Use a single password for every website, and you’re compromising your security. Use a different one each time, and you’re bound to lose track of them. The solution? RoboForm Everywhere, a catch-all tool that will not only manage the passwords on every site you visit but generate better ones. As a simple password database, it’s […]
Just a reminder: Print isn’t dead. And now that printers are becoming as portable as cell phones, it might be around for quite some time. Enter the MEMOBIRD Mobile Thermal Printer, a mini-printer that is versatile, portable – and most importantly, never needs a refill on ink or toner. Measuring just a few inches around, […]
What do Facebook, Twitter, YouTube and Google all have in common? Somewhere in their framework, they all use MySQL, that most versatile (and free!) of database management systems. And they’re not alone. If your company or the one you’d like to work for wrangles data (and who doesn’t?), they’re going to need someone with a […]