Much of this volcanic ash comes from the Great Basin, a geographic area within which the states of Utah and Nevada lie today.

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Last year, a plague outbreak caused a prairie dog die-off in the Badlands of South Dakota. “If we aren't vigilant, the largest black-foot ferret population in the world is potentially at risk,” he ...

Last year, a plague outbreak caused a prairie dog die-off in the Badlands of South Dakota. “If we aren't vigilant, the largest black-foot ferret population in the world is potentially at risk ...