Top 10 Unexplained Mysterious Photos
9. Hessdalen Lights: Alien Or Natural Phenomenon?
The Hessdalen Lights are a spectacular, but unexplained light show, that can be seen various times throughout the year in the skies over Norway. The lights were most active from 1981 through 1984, when people traveled from all over the world to camp out and see the lights which were said to be visible 15-20 times per week. These days, the sightings are down to about 15-20 times a year.
A scientific explanation for these lights remains unproven, leading many to hypothesize that they are caused by alien spacecraft. Other sightings including headlights, mirages, astronomical bodies and aircraft have been noted.
However, as of May 2014, some scientists think they might have uncovered the mystery. The hypothesis is that the metallic rock inside the mountains, combined with the heavy amounts of sulfur in the river, have created a battery. When ionized gas is created from the fumes, the lights become visible. This theory is still not proven, though, and the mystery continues