News
Century Marks
Get moving: Americans could cut carbon emissions by 64 million tons if they’d either walk or bicycle for 30 minutes a day instead of driving. They’d also collectively shed 3 billion pounds of excess fat in the process. Even more would be done for the environment if people gave up eating meat, since livestock production produces 18 percent of the world’s greenhouse-gas emissions (Sierra, March/April).
Century Marks
Strange love: David Levy, an artificial-intelligence researcher from London, thinks the time is coming when humans will hook up with robots for love, sex and even marriage. "If the alternative is that you are lonely and sad and miserable, is it not better to find a robot that claims to love you and acts like it loves you?" he argues (Scientific American, March).