Tall, Ancient and Under Pressure

http://www.nytimes.com/2014/08/12/science/tall-ancient-and-under-pressure.html?smid=nytcore-iphone-share&smprod=nytcore-iphone SEQUOIA NATIONAL PARK, Calif. — High in the Sierras, biologists are struggling to find ways to protect some of the world’s oldest and most

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