Scientists Puzzled By Mysterious Lights In The Sky They Call STEVE

Alberta Aurora Chasers captured STEVE in April in British Columbia, Canada. STEVE is the narrow ribbon of white-purple hues overhead, and the vibrant green light on the right is an aurora located further north.

Scientists don’t know what’s causing the aurora-like phenomenon, which has been known to amateur photographers for decades but only recently came to the attention of researchers.

(Image credit: Ryan Sault )