The dairy farms of Europe are as picturesque as ever, but for the past 10 years they've had something American farms lack: robotic milking technology. Labor costs are higher across the pond, so as many as half the European dairies have the machines, which can milk cows 24 hours a day with no human interaction (see left). Lately, American farmers have begun to wonder if the machines, built by Bou-matic of Madison, Wisconsin, and Lely of Holland, are worth a try. But at $125,000 each, the gizmos are "a high-risk investment," says University of Wisconsin biological systems engineer Doug Reinemann. So the U.S. dairy industry is proceeding cautiously. The Mason Dixon Farm in Gettysburg, Pennsylvania, is one of seven to try the equipment. Farmer Doyle Waybright says he's improved production by some 10 percent. How do the cows like it? "Don't know," says Waybright. "They don't talk to me."
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.