Re: More Martian mysteries
That this indicates life has been disputed on temperature grounds:
Latest Claims Of Martian Life Are Erroneous Says USGS Scientist
Flagstaff - Sept. 26, 2001
by Timothy N. Titus, Ph.D
U.S.G.S. Astrogeology Team
http://www.spacedaily.com/news/mars-life-01h.html
This author ascribes the dark splotches to defrosting already known to occur on Mars dunes.
Bob Clark
