The scientists who sequenced the marijuana plant say they hope the next generation of pot will have stronger therapeutic compounds. JUAN MABROMATA/AFP/Getty Images hide caption

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Express Scripts and Medco Health Services say their merger will help control prescription drug costs. But many prescriptions may only be available by mail, which may not sit well with some consumers. Sean Locke/iStockphoto.com hide caption

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A vendor sells betel leaf wrapped in silver foil in Lucknow, India. AJAY KUMAR SINGH/ASSOCIATED PRESS hide caption

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Meat preservatives like nitrites and sodium have been linked to insulin resistance, which might explain the link between Type 2 diabetes and high consumption of these meats, researchers say. iStockphoto.com hide caption

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A new fetal DNA test to determine a baby's gender could be more accurate and faster than an ultrasound, researchers say. André Panneton/iStockphoto.com hide caption

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A truckload of live turkeys arrives at the Cargill plant in Springdale, Ark., on Aug. 4. Most turkeys in the U.S. are given low doses of antibiotics, which breed resistant strains of bacteria, including Salmonella. Danny Johnston/AP hide caption

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