Two blue blood vessel remains beautifully preserved—one on Mars for 3 billion years, the other in... on the above, so I checked and re-produced following two better photos: Fig. 1: NASA photo of “Rosy-red” Martian soil, expanded many times: http://www.flickr.com/photos/hortonheardawho/2599111808/ Fig. 2: Beautiful blue blood vessel remains found in Specimen SK2 cut from a Carboniferous ...