re: The spherules - R,G,B filter links.
Those links should be:
Red filter image.
http://marsrovers.jpl.nasa.gov/gallery/all/1/p/014/1P129422108EFF0300P2549L4M1.HTML
Green filter image.
http://marsrovers.jpl.nasa.gov/gallery/all/1/p/014/1P129422179EFF0300P2549L5M1.HTML
Blue filter image.
http://marsrovers.jpl.nasa.gov/gallery/all/1/p/014/1P129422250EFF0300P2549L6M1.HTML
Bob Clark
