In Norse mythology, the rainbow bridge connecting the realm of the gods (Asgard) to the realm of humans (Midgard); often used poetically to refer to rainbows.
From Old Norse 'Bifrost' or 'Bilrost', possibly combining elements meaning 'trembling path' or 'bridge of colors'. The term comes directly from Norse mythology and remains culturally significant in Scandinavian heritage.
The Vikings saw rainbows as an actual bridge to heaven—Bifrost was so central to their cosmology that when it breaks in their version of the apocalypse (Ragnarok), it signals the complete end of the world itself.
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