Researchers recently uncovered a startling phenomenon — a set of teardrop-shaped lakes in Antarctica that mysteriously move, jogging along at a pace as fast as 5 feet (1.5 meters) per day. The lakes sit atop the George VI ice shelf — a massive floating plain of ice larger than Vermont, composed of the mingled fronts of glaciers that flow off the edge of the continent and rest on the ocean. Glaciologist Doug MacAyeal at the University of Chicago, and student researcher C.H. LaBarbera, noticed the traveling bodies of water while studying satellite images of 11 ice shelf lakes captured between...