Damien Hirst has made a fortune and become an art-world brand by peering at life's dark side. Rows of skulls stare sightless from deep blue backgrounds in a new exhibition by the man who turned pickled sharks and rotting cows' heads into multimillion-dollar works of art. The most striking thing about the show, "No Love Lost," at London's Wallace Collection, isn't the skulls, the surprise is that these are paintings, executed in oil by Hirst himself.