Moles, brown spots and growths on the skin are usually harmless â but not always. Anyone who has more than 100 moles is at greater risk for melanoma. The first signs can appear in one or more atypical moles. That's why it's so important to get to know your skin very well and to recognize any changes in the moles on your body.
The North Antelope Rochelle coal mine in the Powder River Basin of Wyoming, US, is currently the world's largest coal mine by reserve. The mine was estimated to contain more than 2.3 billion tonnes of recoverable coal as of December 2012. The mine is owned and operated by Peabody Energy.
Coming in at the No.10 spot is the Laramide Porphyry copper cluster of Arizona, New Mexico and Sonora (Mexico). The Morenci open pit, located in southwest Arizona, is the largest copper-producing operation in North America, and majority owner Phelps Dodge Corp. has been mining this rich deposit since the 1880s.