Global Health
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Why don't Tibetans feel lightheaded this high above sea level? It's in the genes. iStockphoto.com hide caption
Friday
Canadian Prime Minister Stephen Harper (left) and French President Nicolas Sarkozy meet at the G8 summit in Huntsville, Ontario. Eric Feferberg/AFP/Getty Images hide caption
Wednesday
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Monday
Melinda Gates discusses maternal and child health at a womens' health conference in Washington on Monday. Haraz N. Ghanbari/AP hide caption