Africa, a continent usually synonymous with hunger, is falling prey to obesity. It's a trend driven by new lifestyles and old beliefs that big is beautiful. More than one-third of African women and a quarter of African men are estimated to be overweight, and the World Health Organization predicts that will rise to 41 percent and 30 percent respectively in the next 10 years. Some 56 percent of South African women are now either obese or overweight, compared to fewer than 10 percent who are underweight. More than 17 percent of adolescents here are overweight _ for teenage girls, it's...