The following is from the meteorite list and I thought it was appropriate here.... -Barrett Huge Spirals Found on Mars-Evidence of New Lava Type? Coils hint that volcanoes, not ice, shaped odd red planet region. National Geographic, April 26, 2012 http://news.nationalgeographic.com/news/2012/04/120426-mars-new-lava-coils-v olcanoes-ice-life-space-science/ New form of Mars lava flow dicovered, ScienceDaily April 26, 2012, http://www.sciencedaily.com/releases/2012/04/120426143804.htm and http://esciencenews.com/articles/2012/04/26/new.form.mars.lava.flow.dicovere d The press release is: Graduate Student Discovers New Form of Lava Flow on Mars, Arizona State University College April 25, 2012, http://www.newswise.com/articles/graduate-student-discovers-new-form-of-lava -flow-on-mars The paper is: Ryan, A. J., and P. R. Christensen, 2012, Coils and Polygonal Crust in the Athabasca Valles Region, Mars, as Evidence for a Volcanic History. Science, vol. 336, no. 6080, pp. 449-452. http://www.sciencemag.org/content/336/6080/449 Best wishes, Paul H.