Word about two space agencies studing Dark Matter.  Designed  to study & mapping plus measuring 2 billion galaxies.  That is more than 1/3 of the sky.  How the Energy of Dark Matter is influencing & creating the ways to use a gravitational pull of large masses.

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!