Mary Hughes was just 17 years old in 1908 when the No. 1 Mine exploded twice in one day—and for the second time in five years—in Hanna, Wyo. Her story shows the devastating impact that coal mine accidents had on families like the Hugheses across Wyoming’s mining communities, and reveals her determination to survive disaster.

A late-1960s Atomic Energy Commission plan to extract Wyoming natural gas with five underground nuclear explosions won strong initial support from the oil and gas industry and the federal government. Finally, however, the idea stalled, thanks to the emergence of more information on possible dangers, to Washington politics, and especially to intense local opposition in Sublette County, Wyo., where the devices were slated to be detonated.

Wind is constant in Wyoming, but ways of harnessing its power have changed substantially over time, from wooden windmills pumping water for railroads and livestock, through small, wind-charged battery plants on 1920s ranches to the huge wind turbines spiking our skylines today.

Seminoe and Kortes dams, both located in a remote stretch of northern Carbon County, Wyo., were constructed in the 1930s and 1940s primarily for the production of hydropower. While power plants at both dams still generate electricity, the area is frequented by tourists, especially fishermen who travel to the renowned Miracle Mile, just downstream from Kortes Dam, to catch trout.

In 1843, explorer John C. Frémont reported coal in what’s now southwest Wyoming. In the 1860s, the route of the new transcontinental railroad across Wyoming was chosen partly to access abundant coal deposits for fuel for the locomotives. Coal mining boomed, labor strife increased and Wyoming’s coal industry thrived despite worker strikes and a number of horrific mine accidents. Today, the state produces 40 percent of the nation’s coal, most of it from huge strip mines in the Powder River Basin in northeast Wyoming, for rail shipment to electric power plants in 34 states.