That seems unlikely, what would create it.<br /><br />The article offers several possible explanations:<br /><br />"With both rovers having gathered evidence for the presence of water in Mars' past, the lack of oxidization is puzzling. Of course, the unknowns are how long these meteorites have been on Mars and what conditions they have been exposed to since they landed."<br /><br />"There really isn't any way to determine how long these meteorites have been on the surface of Mars. I suspect that it has been millions of years, perhaps billions of years, but we just don't know," McSween said.<br /><br />If any of the iron meteorites so far discovered had come into contact with liquid water, ice or water vapor, it should have adopted the same rusty hue as the rest of the surface. Perhaps the rovers have simply caught these specimens during a brief stint on the surface.<br /><br />"Sand dunes move around on Mars and fine dust settles out of the atmosphere, so there are certainly mechanisms for burying meteorites and then re-exposing them. In many places they might sit on the surface for many millions of years without being buried," McSween said.<br /><br />Abrasion by wind blown particles could account for the lack of oxidization on the iron meteorites. Although iron meteorites are easily detectable, they may not be the best candidates for holding onto evidence of water."<br /><br /><br /><br /> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>