Drive past towering spear-like rock formations through mountain tunnels on the Needles Highway, and don’t be surprised if the park’s herd of 1,300 buffalo cause a “South Dakota traffic jam ...

Scientists believe Bear Butte was formed around 65 million yea rs ago when magma (molten rock) from the earth ... in Wyoming and the Black Hills of South Dakota was covered again and again ...

South Dakota state historian Doane Robinson writes to eminent Chicago sculptor Lorado Taft proposing that one of the "Needles" -- spiky rock formations -- of the Black Hills be carved in the ...

Near the Black Hills of South Dakota, there's a state park that rivals the grandeur of Italy's Dolomites. Known for its jagged peaks and slender spire rock formations, the park's Cathedral Spires ...

A team of researchers at the University of Northern Iowa (UNI) is exploring some of the deepest caves in the country to learn more about life in extreme environments.

Deep below Earth's surface, rock and mineral formations lay hidden ... As it turns out, the chemistry in South Dakota's Wind Cave is likely similar to places like Europa—and easier to reach.