The planet Mars seen over a city landmark, a weather vane in the form of an angel, fixed atop a spire of the Saint Peter and Paul Cathedral in St.Petersburg, Russia, Friday, April 11, 2014. On April 8, 2014, Mars reached opposition in its nearly two-year orbit, when it's directly opposite the sun in our sky, and this year Mars will be closer to Earth than it has been since 2007, according to NASA. Photo: Dmitry Lovetsky, AP  / AP
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