Wind energy boom and golden eagles collide in the US West

The rush to build wind farms to combat climate change is colliding with preservation of one of the U.S. West's most spectacular predators—the golden eagle—as the species teeters on the edge of decline.

As species recover, some threaten others in more dire shape

Concealed behind trees near Lake Michigan, two scientists remotely manipulated a robotic owl on the forest floor. As the intruder flapped its wings and hooted, a merlin guarding its nest in a nearby pine darted overhead, ...

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