Abstract
After years of unconfirmed reports and false sightings in Mexico and Central America, scientists now know where the northern black swift ( Cypseloides niger borealis ) goes each winter. Last month, aerial photographer and biologist Matevž Lenarčič flew a single-seat airplane across 2000 kilometers of airspace between Easter Island and Totegegie Airport in French Polynesia. And this week's numbers quantify the amount spent on genetic tests in the United States in 2010 and the annual carbon footprint of pumping for China's groundwater irrigation system.
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