Editing Cosmic egg (section)

== Zoroastrian mythology ==
{{Main|Zoroastrian cosmology}}

In Zoroastrian cosmography, the sky was considered to be spherical with an outer boundary (called a ''parkān''), an idea that likely goes back to Sumerians. The Earth is also spherical and exists within the spherical sky. To help convey this cosmology, a number of ancient writers, including [[Empedocles]], came up with the analogy of an egg: the outer spherical and bounded sky is like the outer shell, whereas the Earth is represented by the inner round yolk within. This analogy, in turn, is found in a number of Zoroastrian texts, including the [[Wizidagiha-i Zadspram|Selections of Zadspram]].{{Sfn|Bailey|1943|p=135–136}}{{Sfn|Panaino|2019|p=39–41}}