Mammatus clouds (DI02038) Photo by Ben Foster

Mammatus clouds (DI02037) Photo by Ben Foster

Mammatus clouds (DI02036) Photo by Ben Foster

Foothills Laboratory 4 at sunset (DI01985)

Wind farm at sunset (DI01929)

Wind turbines in action (DI01927)

Wind farm at sunset (DI01926)

Wind farm at sunset (DI01924)

Wind farm in late afternoon (DI01923)

Wind farm at sunset (DI01922)

Wind farm at sunset (DI01921)

Wind farm in late afternoon (DI01920)