The Powder River Basin sports a colorful history. Bones of bison slaughtered by people, found south of Sundance, Wyo., date back 6,000 years, and northeast Wyoming remained a favorite hunting ground for American Indians into the late 19th century. At that time the Powder River Basin was the scene of violent conflicts between the Indians and U.S. military men. Abundant grass made this region a favored spot for cattle and sheep ranchers. Under the grass is coal—so much of it that about 40 percent of the coal mined in the U.S., comes from the Powder River Basin.

The mystery surrounding the Pedro Mountain Mummy, discovered in the 1930s about 60 miles south of Casper, Wyo., by two gold prospectors, continues to intrigue people. While some sensational media accounts indicated the mummy might have been one of the little people of American Indian folklore, scientists who studied the artifact in detail have concluded that the mummy was an infant who died because of a congenital defect.

Called Camp le Grand by trappers and fur traders who held rendezvous in the 1830s, the scenic place at the base of the Sierra Madre Mountains eventually became known as Encampment. Rich copper deposits brought miners, promoters and others who hoped the town would become a western industrial stronghold. That didn’t happen, but today, visitors and locals gather here for numerous festivals held throughout the year that celebrate the town’s heritage.

Caroline Lockhart wrote a handful of novels about Wyoming in the early 20th century. They made her famous and rich, and they hold up well today. At the same time, she was a new kind of activist, a central figure in bringing to the town of Cody and the state of Wyoming a new kind of nostalgia-based culture that both have embraced ever since.

Oil seeps were reported often in the early 19th century in what later became Wyoming; it was sold, for example to Oregon Trail travelers for wagon lubricant. The first producing well in Wyoming Territory was drilled in 1883 at Dallas Dome southeast Lander. Perhaps the state’s best-known historic oil producing region is the Salt Creek Field, north of Casper, which was one of the world’s largest-producing fields in the 1920s. Oil remains an important part of Wyoming’s economy and culture today, and the state is ranked high among the top national producers.

The basin of the North Platte River takes up the southeastern quarter of Wyoming, plus a finger of land along the tributary Sweetwater River in the center of the state. The courses of the North Platte and Sweetwater determined early fur-trade and emigrant routes. Since that time, the basin’s water and other resources have continued to draw industry, stock raising, dams and irrigation—and people.

From their modest upbringings, Mardy and Olaus Murie became diligent, adventurous and charismatic leaders of the American conservation movement. With their siblings, Louise and Adolph Murie, they shaped conservation biology and ecology and are credited with some of our country’s most historic efforts to protect wild lands. The two couples split their time between remote Alaska and a ranch at the feet of the Tetons, where the Murie Center carries on their efforts today.

University of Wyoming student Matthew Shepard, who was openly gay, was brutally beaten in October 1998 by Aaron McKinney and Russell Henderson. Shepard died several days later. The incident received international media coverage and continues to spark controversy about hate crimes. Shepard’s parents, Judy and Dennis, established a foundation in Matthew’s name, which continues its pro-LGBT educational work today.

Educator Estelle Reel fought hard to obtain the Republican nomination for Wyoming superintendent of public instruction in 1894, after which she became the first woman in Wyoming elected to a statewide office. In 1898, President McKinley named her national superintendent of Indian schools.

Accidents and disasters have plagued Wyoming coal mines since territorial times. In 1886, legislators created the office of the state mine inspector to help improve safety. Still, explosions and cave-ins killed hundreds of miners in the following decades. The worst accidents happened in Hanna in 1903 and near Kemmerer in 1923. Lawmakers continued to increase safety measures and eventually expanded the duties of the state mine inspector. Modern strip mining is far safer.