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I was struck today by the juxtaposition of two recent articles here at ScientificAmerican.com . In “ Thin Body of Evidence ,” John Horgan expresses his skepticism about journalist Gary Taubes’s claims that carbohydrates, not fat, are the cause of obesity, heart disease and other health problems faced by many Americans

India is running out of water for crops. Most of the water-intensive agriculture in the nation takes place in Punjab, a state in the northwest that makes up 2 percent of the country’s territory but provides more than 50 percent of its grain reserves. Farmers there currently pump out 45 percent more groundwater than is replenished by monsoon rains