United States Geological Survey

Landsat—The watchman that never sleeps

In western North America, mountain pine beetles infest and ravage thousands of acres of forest lands. Landsat satellites bear witness to the onslaught in a way that neither humans nor most other satellites can.

dateJul 19, 2016 in Environment
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Hot days can trigger Yosemite rockfalls

After more than three years of monitoring the towering granite cliffs of Yosemite National Park, scientists have new insights into a potentially important mechanism that can trigger rockfalls in the park. Although many conditions ...

dateMar 29, 2016 in Earth Sciences
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