Hessdalen Lights are unexplained lights (a type of Will-o'-the-wisp ) usually seen in the valley of Hessdalen, Norway.
These lights are well known and have been recorded and studied by physicists. One explanation attributes the phenomenon to an incompletely understood combustion process in the air involving clouds of dust from the valley floor containing scandium.[1] Some sightings, though, have been identified as misperceptions of astronomical bodies, aircraft, car headlights, and mirages.[2]
Will-o'-the-wisp for further hypotheses.
   | Hessdalen 1998: Triangle Project - The Triangle Project |
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