Roland Piquepaille writes "According to the Ludington Daily News, Michigan, Danish agricultural engineers have built a robot to help farmers with weeds. The Hortibot is about 3-foot-by-3-foot, is self-propelled, and uses global positioning system (GPS). It can recognize 25 different kinds of weeds and eliminate them by using its weed-removing attachments. It's also very environmentally friendly because it can reduce herbicide usage by 75 percent. But so far, it's only a prototype and the Danish engineers need to find a manufacturer for distribution."