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Nine worlds is the fresh top of this atlas's standing-contrast tier, four debated-or-debunked facts of its own. Norse tradition names nine worlds held together by the tree Yggdrasil, among them Asgard of the Aesir, Midgard of humans, Jotunheim of the giants and Hel of the dead, and the atlas's own description already flags the catch: "The medieval sources list the nine incompletely and inconsistently, so the tidy modern enumeration is a reconstruction." Reading all four contested facts individually finds three of them are one finding restated, and the fourth is a genuinely separate question.

Three Facts, One Claim, Told at Three Grains

Origin-period, origin-period-start-year and origin-period-end-year all carry the identical note, word for word: "The Eddas say nine worlds. They never list them. Every tidy enumeration in circulation, Asgard, Vanaheim, Alfheim, Midgard, Jotunheim, Svartalfheim, Nidavellir, Muspelheim, Niflheim, in whatever order, is a modern reconstruction assembled from names scattered across the sources, set out in that form no earlier than the nineteenth century and hardened by twentieth-century handbooks. No medieval text gives the list." One claim, that the specific nine-item list a reader meets today is a modern invention rather than a medieval one, recorded three times over: once for the period as a whole, once for its start bound and once for its end bound. Three debunked facts, one debunked idea.

A Fourth Fact, Asking a Different Question

The fourth contested fact, doctrinal-status, is not the same claim again. It does not ask whether the specific list is old; it asks whether the underlying idea, a layered cosmos of nine worlds around a central tree, reflects a real pre-Christian belief at all. The atlas records this as a live scholarly argument, not a settled debunking: "Scholars debate how far the nine-worlds cosmology reflects a coherent pre-Christian system versus later systematization, and its standing as non-scholarly popular reconstruction versus attested medieval doctrine is itself contested." A count of four would treat every fact as equally uncertain. Reading them individually finds one well-evidenced debunking, that the popular list is modern, told three times, and one open question underneath it that the debunking does not answer either way.

Where To Read More

• Nine worldsCosmology and World-StructureFour contested facts; three are one debunked claim about the list, the fourth a separate open debate about the cosmology itself