A long-lost slab of Earth’s crust may be pulling away the bottom of the oldest part of North America, scientists say ...

From railroad tycoons to golden fields, the origins of each county’s name reveal the region’s political, cultural and ...

Revised textbooks on the Mandan, Hidatsa, & Arikara Nation (Three Affiliated Tribes), the Spirit Lake Nation, the Standing Rock Sioux Tribe, the Turtle Mountain Band of Chippewa Indians, and the Sisse ...