At a meeting of the American Astronomical Society, scientists talked about mapping dark matter, measuring the 'graininess' of spacetime, and discovering the smallest exoplanets ever, using the Kepler space telescope. Ron Cowen, who reported on the meeting for Nature, discusses those findings.
Last month, the U.S. Alcohol and Tobacco Tax and Trade Bureau approved a powdered alcohol product, making both parents and lawmakers nervous. Some states have already banned powdered alcohol. NPR's Arun Rath speaks with Brent Roth of Wired, who made his own powdered concoction and put it to the test.
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