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Sanders, Democratic stars make pitch for Clinton after messy first day


August 29, 2012
Black rosy finches are one of three rosy finch species nesting above timberline in North America. Here a juvenile (left) begs from an adult on the Beartooth Plateau in Wyoming. Photos by Keith Corliss
Persistence produces two alpine bird species
August 29, 2012 - 12:00am