Book excerpt: An ancient inland sea, surrounded by lush vegetation and inhabited by dinosaurs, helped create the mineral-rich landscape where Rock Springs, Wyoming, now sits. French trappers first encountered American Indians who were traveling via a natural corridor that traverses the region, and eventually pioneer trails used this same route in the great westward expansion. The First Transcontinental Railroad arrived in 1868, and the national demand for energy in the form of fossil fuels turned everyone's attention to the vast coal deposits. Thus the frontier outpost of Rock Springs became an important energy center, and immigrants from around the world came to work in the mines and make this land their home. As local businessman Leonard Hay used to say, "All wealth comes from the earth." Today other minerals have joined coal as new sources of wealth for Rock Springs, and plans are being made to harness the wind that carved out this unique landscape.