South Dakota is home to one of eight dark sky places left in the continental U.S, said Diane Knutson, the president of DarkSky International and founder of the DarkSky South Dakota Chapter.

SIOUX FALLS, S.D. – Before severe weather swept through South Dakota on Tuesday, residents around Sioux Falls witnessed a hauntingly rare phenomenon: a green sky. Yes, the sky was green. And not ...

The skies above Sioux Falls, South Dakota, turned a strange and slightly apocalyptic shade of green on Tuesday, as a powerful storm swept through the state. Images of the surreal sky were widely ...