Article: Head count.(LIFE/ECOSYSTEMS)(giant kangaroo rats)(Brief article)

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In a high-tech first, scientists plan to spy on an endangered species from space. Giant kangaroo rats live in the desert grasslands of California's Carrizo Plain, where they gather grass seeds by harvesting the plants in a circle around their burrows. Counting these grassless spots in satellite images from the past 30 years will reveal how the population of rats has changed ...

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