We love our WiFi, but it's far from perfect. Speed depends greatly on conditions, magnetic waves don't always play nicely with sensitive equipment, and the ability for someone to drive by and steal your precious infos is always disconcerting. Researchers at Penn State have what they believe is a better solution: light. The team uses laser diodes to convert data signals to light, then photo diodes on the other end to convert it back to data, a system that (unlike others we've seen) doesn't require
