A new study shows obesity rates are rising in poor and developing countries, particularly among women, marking a major departure from historical trends and long-held beliefs, Reuters reports. The joint U.S.-Brazilian study included data from 37 countries including Brazil, China and India. "In many poorer nations, obesity has become more prevalent than malnutrition," said Barry Popkin, a researcher at the University of North Carolina. "Worldwide, the burden of obesity increasingly rests on the poor and less educated, even in many developing nations we never thought of as having an obesity problem."