The Friday file: From Neil Armstrong’s moon walk in ’69 through the last Luna mission in ‘76, 843 lbs. of moon rock were brought to earth, all of which belongs to the US Government. In ’93, 0.2 grams (one carat) of Russian moon pebbles sold at auction for $442,500, equal to $1.1 billion/lb! If you plan to scoop some up yourself, note that a flight-rated NASA spacesuit costs $12 million.