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WASHINGTON – Scientists now have close-up pictures of a hyperactive comet that seems to be spewing water. Hartley 2 isn't the only such comet, but it's the first to be visited by a spacecraft during a flyby, researchers report in Friday's edition of the journal Science. University of Maryland...

Chile Earthquake May Have Shortened Days on Earth 2 hrs 20 mins ago The massive 8.8 earthquake that struck Chile may have changed the entire Earth's rotation and shortened the length of days on our planet, a NASA scientist said Monday. The quake, the seventh strongest earthquake in recorded...