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Science

The residents of the Georgetown and South Park neighborhoods in Seattle’s Duwamish Valley now know how much diesel exhaust they are exposed to. A report on findings from an air pollution study comparing these neighborhoods to Beacon Hill and Queen Anne was published today, Sept. 13.

For the first time, scientists have direct geochemical evidence that the 150-mile long Tsangpo Gorge, possibly the world’s deepest, was the conduit by which megafloods from glacial lakes, perhaps half the volume of Lake Erie, drained catastrophically through the Himalayas when their ice dams failed during the last 2 million years.