Columbia University

Excavated ship traced to Colonial-era Philadelphia

Four years ago this month, archeologists monitoring the excavation of the former World Trade Center site uncovered a ghostly surprise: the bones of an ancient sailing ship. Tree-ring scientists at Columbia University's Lamont-Doherty ...

dateJul 29, 2014 in Earth Sciences
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Pumping draws arsenic toward a big-city aquifer

Naturally occurring arsenic pollutes wells across the world, especially in south and southeast Asia, where an estimated 100 million people are exposed to levels that can cause heart, liver and kidney problems, diabetes and ...

dateSep 11, 2013 in Environment
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