United Press International: NASA says its Mars Reconnaissance Orbiter is providing new information about climate change on Mars and the planet’s sub-surface geology. Space agency officials said the spacecraft’s Shallow Radar, or SHARAD, instrument has allowed scientists to reconstruct the formation of a large chasm and a series of spiral troughs on the northern ice cap of Mars. “SHARAD is giving us a beautifully detailed view of ice deposits, whether at the poles or buried in midlatitudes, as they changed …