Reine, Norway | Shot by Brian Matiash
It's not actually caused by aliens, magic, or Thor, but don't be too disappointed because this light show is still pretty metal. The Aurora Borealis is formed when electrons slam into oxygen and nitrogen atoms anywhere from 50 to 310 miles above the Earth. The atoms get excited by the collisions (same, atoms) and when they calm down, that extra energy is released as light. The other term for this phenomena -- "major geomagnetic storm" -- was perhaps a little too metal.