This spring the Park Avenue Armory will be the site of his artistic expedition to Mars, complete with a biologylab for Martian plant cultivation. (Sachs borrowed the technology from marijuana growers.) And this month his show "Work" opens at New York's Sperone Westwater gallery, featuring pieces like a Japanese tea ceremony and a version of Roy Lichtenstein's razor-blade painting "Duridium, " made here out of screws.