For snow to form, there has to be stuff in the atmosphere *— microbes, specks of dust — for water molecules to freeze on and then form ice crystals. Researchers at Michigan Technological University in Houghton set out to investigate the mystery of where snow in the Arctic comes from, and how it can fall so persistently in the region. "Within a few hours, you basically purge the atmosphere of all those particles," Raymond Shaw, a physicist at Michigan Technological University, said in a statement. It turns out that atmospheric particles that were thought not to play a role in the formation of ice crystals may actually be key drivers of snowfall in the Arctic, a new study by Shaw and his colleagues finds.{br}{br}View the Entire Article{br}