NPR 2008-02-22

From NPR News in Washington, I'm Nora Raum. President Bush is wrapping up his five-nation African tour with a visit to Liberia. He arrived today in the capital Monrovia named for President James Monroe. Liberia had been founded by freed slaves. The

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But, as powerful as Rome may have been, they couldn't change the rules of the universe, and neither of these calendars add up to anywhere close to the time it takes us to orbit the sun. After a few years, the seasons are out of whack with the months,

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Coincidentally, at about the time that Einstein was affixing a cosmological constant to his theory, at the Lowell Observatory in Arizona, an astronomer with the cheerily intergalactic name of Vesto Slipher (who was in fact from Indiana) was taking sp

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Meanwhile, a 45-meter wide asteroid has hurtled safely past earth after it came within 27-thousand kilometers, making it the closest known flyby for a rock of its size. The asteroid, named 2012 DA14 came closer to earth than many communication and we