earlier study http://www.spaceref.com/news/viewpr.html?pid=18410 Goddard Space Flight Center, 2005 http://www.spaceref.com/news/viewpr.html?pid=18410 http://www.spaceref.com/news/viewpr.html?pid=18410 announced by NASA yesterday http://www.spaceref.com/news/viewpr.html?pid=18410 Last week’s announcement by NASA http://www.spaceref.com/news/viewpr.html?pid=18410 geologic SpaceRef.com http://www.spaceref.com/news/viewpr.html?pid=18410 Big Bang http://www.spaceref.com/news/viewpr.html?pid=18410 SpaceRef.com Cassini data analysis SpaceRef.com Goddard Space Flight Center, 2005 SpaceRef.com http://www.spaceref.com/news/viewpr.html?pid=18410 geologic earlier study told reporters Nov. 30, 2005