CHICAGO - The principals of design-focused production studio Leviathan (www.lvthn.com) are very proud to announce the debut of their collaborations with executives from integrated marketing communications agency Hoffman York in Chicago and the Museum of Science and Industry, Chicago (MSI). Two new :30 broadcast spots created by Leviathan recently began airing through targeted local cable, broadcast and online media placements, including "Science Rules!" which debuted this week.