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Why the difference?<br /><br />Alaska researcher changes asteroid orbit <br />Posted : Wed, 09 Jan 2008 04:04:24 GMT <br />Author : Science News Editor <br />Category : Science (Technology) <br />News Alerts by Email click here ) <br /> Create your own RSS <br /> <br />Science Technology News | Home <br /> <br /> <br /><br />ANCHORAGE, Alaska, Jan. 8 An astrophysicist at the University of Alaska uncovered the information that narrowed the odds of an asteroid hitting Mars.<br /><br />Andrew Puckett, who is doing post-doctoral research in Anchorage, found archival NASA data while using the Christmas break as a working vacation, the Anchorage Daily News reported. After he supplied the information to NASA, agency scientists increased the possibility of "Asteroid 2007 WD5" striking Mars from one in 75 to one in 28.<br /><br />http://www.earthtimes.org/articles/show/171121.html<br /><br /><br />AND??<br /><br />By Tariq Malik<br /><br />updated 5:24 p.m. PT, Tues., Jan. 8, 2008<br />The chances of an asteroid smacking into Mars this month are slipping away as astronomers continue to refine its course toward the Red Planet.<br /><br />The space rock, an asteroid called 2007 WD5, is now expected to miss Mars by about 18,641 miles (30,000 kilometers), according a Tuesday report by NASA's Near Earth Object (NEO) program office.<br /><br />http://www.msnbc.msn.com/id/22562747/<br /><br />Which one do I believe? 1 in 40 or 1 in 28??