Paul Graham’s photography practice has long been driven by an insatiable wanderlust: He’s documented travels to Japan, throughout Europe, around his native Britain, and across the vast expanse of America. The exhibition “The Whiteness of the Whale” at the High Museum of Art homed in on Graham’s portrayals of the last. Consisting of more than forty works from Graham’s three major stateside projects—“American Night,” 1998–2002; “A Shimmer Possibility,” 2004–2006; and “The Present,” 2009–11—this show made a case for the photograph’s capacity to encourage active looking, incite empathy,