Soot emitting from car
The contribution of soot to global warming has been underestimated; cutting soot emissions could be the key to saving the Arctic sea ice, a Stanford study finds.  Video
Gassia Armenian preparing exhibit
Exhibition features the beautiful and dangerous, seductive and protective water spirit known as "Mami Wata."
Katya Drozdova
A Soviet-Afghan political analyst finds new discoveries in Hoover Archives, and old news in today's headlines.
Nitrous oxide thruster
Researchers encourage bacteria that produce nitrous oxide and methane in sewage sludge. The gases can then be cleanly burned to produce energy to run the plant.

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