PLL blog 10 photo 2 (hb6275)

Robert Jacobsen takes an infrared spectrum of a large boulder near PLL Base Camp. The spectrometer is in his backpack; the computer in front of him displays and stores the data the spectrometer records. Credit: Henry Bortman

Robert Jacobsen takes an infrared spectrum of a large boulder near PLL Base Camp. The spectrometer is in his backpack; the computer in front of him displays and stores the data the spectrometer records. Credit: Henry Bortman

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