Hedy Lamarr is famous as a glamorous movie star from the black-and-white era of film. But what most people don't know about her is that, in she co-invented a device that helped make possible the development of GPS, Bluetooth, and Wi-Fi technology!
Infographic: ElectricityA visual cheat sheet about electrical physics, containing the most important formulas of current and Ohm’s law expressed through an impossible water circuit analogy.(by Pierluigi Scotolati)
This 3D Printer Is Made Out of a Floppy Disk Drive and Other E-Waste