Harvester handles heavy rocks like they’re small potatoes

FARGO, N.D. — From the side, there’s a visual similarity between the preying mantis and the Rock Mantis, the big difference being that the Rock Mantis eats stones instead of bugs. Measuring 52 feet long, the Rock Mantis RP1000 is one serious stone-picking machine. It harvests rocks up to one foot in diameter while cruising […] Read more