Contributed by Peter Plagens / The first edition of the Getty-sponsored “Pacific Standard Time” slate of exhibitions in 2011 was subtitled simply “Art in L.A., 1945 – 1980,” and it aimed to elucidate Southern California’s contribution to American postwar modern art. In 2017, the second iteration was called “LA/LA,” indicating the city’s Latin American art and artists. This time around PST has declared a more specific theme, “Art and Science Collide,” reminiscent of one of those noble Rose Parade rubrics…