Native westslope cutthroat trout swim in the north fork of the Flathead River in northwestern Montana. However, cutthroat trout populations are threatened by hybridization from mating with rainbow trout. Jonny Armstrong/USGS hide caption

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Jonny Armstrong/USGS

In The Rockies, Climate Change Spells Trouble For Cutthroat Trout

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Austin Holland, research seismologist at the Oklahoma Geological Survey, gestures to a chart of Oklahoma earthquakes in June 2014 as he talks about recent earthquake activity at his offices at the University of Oklahoma in Norman, Okla. The state had three times as many earthquakes as California last year. Sue Ogrocki/AP hide caption

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Sue Ogrocki/AP

Oklahomans Feel Way More Earthquakes Than Californians; Now They Know Why

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