September 25, 2012 Centuries of silver mining have left Cerro Rico mountain in the southern highlands of Bolivia on the verge of collapse. The Spanish forced Quechua Indian slaves into the mines to bankroll their empire. Today, the Quechua own the mines, but conditions here are still brutal.
September 24, 2012 Muscular fish like salmon, tuna and eel can benefit from more exercise in a farmed fish environment. New research and a new book are aiming to convince fish farmers that getting fish to swim faster will mean healthier products, less waste, and more profit.
September 22, 2012 On World Rhino Day, people across the globe celebrate the rhinoceros and raise awareness to save all five species.
September 22, 2012 Residents of Zimbabwe's second largest city are flushing the toilets at the same time tonight. The action isn't some form of protest, but the result of 72 hours of water restrictions thanks to a severe drought.
September 21, 2012 An ancient beauty in southwestern Colorado, Chimney Rock became the third national monument named by President Obama on Friday. More than just a spectacular feature, Chimney Rock's towering sandstone pillars were of astronomical importance to the ancestral Pueblo people over 1,000 years ago.
September 17, 2012 Some of the biggest human migrations coincided with major changes in climate, according to a new analysis. Researchers say early humans set out in search of climates where more food was available. And some populations stayed put in certain locations because barriers like glaciers blocked their progress.
September 17, 2012 After a mild winter and a late-April freeze, Michigan's apple harvest was decimated. Less fruit means fewer picking jobs. It also means little to no income from apples in storage that growers rely on to get them through to next year's harvest.