April 18 (UPI) -- A mysterious spiral caught on camera above the northern lights in Alaska was likely the result of fuel being released from a SpaceX rocket, an expert said. The spiral was caught on camera by Todd Salat, aka The Aurora Hunter, while he was photographing the northern lights just before 2 a.m. southeast of Fairbanks. Elizabeth Withnall also posted photos of the strange sight she encountered while watching the lights from the northwestern part of the state. Don Hampton, a research associate professor at the University of Alaska Fairbanks Geophysical Institute, told the Anchorage Daily News the...