Scientists Are Puzzled By Mysterious Lights In The Sky. They Call Them STEVE

Scientists Are Puzzled By Mysterious Lights In The Sky. They Call Them 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 )