Words explaining that the surface of Mars is truely GREY.  Not Red as we think.  NASA's rover Curiosity was digging in the surface.  It took many samples.  The rover studied the rocks.   It came done to the chemical breakdown of the soil.  Mars had similar minerals like Earth. There were clues of habittable environments.   Ancient networks of stream channels.  There is clay minerals that is an element of fresh water.

Some of the puzzles that people list for the public get indexed by the search engines (like Google). Some people find those puzzles and cannot figure out how to make a puzzle of their own. So this page now has the navigation sidebar.

There are now buttons on the puzzle so that you can get a clean page, in either HTML or PDF, that you can use your browser's print button to print. The PDF format allows the web site to know how large a printer page is, and the fonts are scaled to fill the page. The PDF takes awhile to generate. Don't panic!