the.com/cosmic egg

means A mythic or cosmological image of the universe beginning as a single egg that hatches or splits apart to form sky and earth, gods, or all creation.

from Not from one coinage but a recurring image across many mythologies — Vedic, Greek Orphic, Chinese (Pangu), Finnish, Polynesian, and others — where an egg (sometimes golden, floating in primordial waters or darkness) cracks open to birth the cosmos. The English phrase 'cosmic egg' is a modern label, used since the 19th-20th centuries, for this shared mythic motif; it was later borrowed playfully by science writers for Georges Lemaître's 'primeval atom,' the ancestor of Big Bang theory, because an expanding universe from one dense point was too tempting not to call an egg.