What’s the connection between an ancient Levite rebellion and the dye used on the bluejeans in your closet? Or Coca-Cola and Orthodox Jews? Both examples highlight the ways in which the material and spiritual worlds intersect. In the latter, an Atlanta rabbi convinced the soft-drink maker to divulge its secret formula and replace key ingredients to make Coke kosher. (Too bad Dr. Brown’s Cream Soda got screwed in the process.) In their book Old Wine, New Flasks: Reflections on Science and Jewish Traditions, Roald Hoffman and co-author Shira Leibowitz Schmidt examine the confluence of science and religion in questions of authority, purity, identity, and the natural vs. the unnatural. Hoffman, a 1981 Nobel laureate, Cornell University professor of chemistry, and poet (what a mensch!), will lecture on kosher Coke and other phenomena at 8 p.m. at the Jewish Community Center of Greater Washington, 6125 Montrose Road, Rockville. Free. (301) 881-0100. (Elissa Silverman)