More Spirit evidence for liquid water on Mars.
Hollow mystery for Mars rover
13:27 19 January 04
NewScientist.com news service
"Such grains were completely unexpected. But John Grotzinger, a geologist at the Massachusetts Institute of Technology, says they closely resemble formations he has seen in soils in the southwestern deserts of the US. "There are little tubes that build up by capillary action," he told New Scientist, as salty water evaporates from the nearly-dry soil."
http://www.newscientist.com/news/news.jsp?id=ns99994577
Bob Clark