Lenz’s Law is one of those physics tricks that look like magic if you don’t understand what’s happening. [Seth Robinson] was inspired by the way eddy currents cause a cylindrical neodymium magnet to ...

Inspired by our roundup of 10 great magnet hacks, one vertical-thinking Lifehacker reader combined 10 seriously strong neodymium magnets and two Altoids tins to tack his desk-cluttering accessories ...