For the Algonquin people, the lights are a reflection of a massive fire lit by their creator , Nanahbozho, to remind them he is still watching over them from the far north. Folklore and Omens
History of the Northern Lights: myths and legends - Hurtigruten Aurora Borealis
Many Inuit communities believe the lights are the spirits of the dead playing a game of soccer in the heavens. They use a walrus skull as the ball , skittering and dancing across the sky. For the Algonquin people, the lights are a