Glowing green ‘dunes’ in the sky mesmerized skygazers. They turned out to be a new kind of aurora.0

• Earth Mysteries, From Around the Web
• January 31, 2020

When mysterious glowing stripes of green lit up Finnish skies in 2018, it didn’t go unnoticed by avid aurora chasers. The pattern of light was unfamiliar and strangely perfect, reaching out toward the horizon like a set of celestial sand dunes.