The square, earth-tone industrial building on North Sixth Avenue in Tucson, Arizona, has little of the proud, high-tech gloss of NASA's Jet Propulsion Laboratory, traditional home of U.S. Mars missions. The historic NASA center in Pasadena, California, has neatly clipped lawns and squadrons of badge-wearing engineers and scientists, who work each day surrounded by memorabilia from decades of solar system exploration. Everything about the place fairly shouts Space science is our business.
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