This cute and easy Christmas snowman keychain crochet tutorial shows you how to make an adorable mini accessory perfect for ...

As the age-old adage goes, “When life hands you lemons, make lemonade.” In the case of Sean Kennedy and the lanterfly ...

The Verde Mining district grew to become one of the greatest copper producers in Arizona from 1883 until 1992. Two primary mines produced more than 99% of the district’s copper production: the United ...

Located in the Lower San Pedro River Basin 40 miles northeast of Tucson and a mile south of the Mammoth-St. Anthony Mine, the San Manuel area enticed 1880s prospectors attracted to the copper-stained ...

Department of Geology and Environmental Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States Department of Energy - National Energy Technology Laboratory, Pittsburgh, ...

† Civil and Environmental Engineering, The University of Iowa, Iowa City, Iowa 52242, United States ‡ Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706, United ...