Forget roaring lawnmowers and fuel-guzzling tractors. Today's solar companies are turning to flocks of sheep to trim grass and control weeds under solar panels. These eco-friendly grazers easily ...

Kenny Lee, CEO of Aigen with his low-energy robot. Worldwide, weeding is a big business. In general, it's back-breaking labor – not the kind of thing that it's particularly easy for humans to do. In ...