Science Daily: Scientists know that air pollution particles from mid-latitude cities migrate to the Arctic and form an ugly haze, but a new University of Utah study finds surprising evidence that polar explorers saw the same phenomenon as early as 1870. "The reaction from some colleagues — when we first mentioned that people had seen haze in the late 1800s — was that it was crazy," says Tim Garrett, assistant professor of meteorology and senior author of the study. "Who would have …