It appears Nobel Peace Prize laureate and former vice president Al Gore is back in the game. Back in the dating game, that is. He has, according to The Washington Post's Reliable Source blog, a "serious girlfriend." Her name is Elizabeth Keadle—better known as Liz—a well-heeled Democratic donor from Southern California in her 50s with a background in science and a devotion to environmental causes. The relationship is solid enough that she accompanied Gore, 64, and an eclectic group of experts and VIPs (Richard Branson, singer Jason Mraz, actor Tommy Lee Jones) on a trip to Antarctica in January to...