[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/CosmicEggTheory_01_300_4475.png]]
[[caption-width-right:300: Now we know which came first. [[MindScrew (But then, who laid it?)]]]]
[-[[caption-width-right:300:Illustration by [[http://www.paintingsilove.com/artist/carol2 Carol Phillipson]].]]-]

->''"It is said to have emerged from an egg in a place where there was nothing, then shaped the world."''
-->-- ''[[VideoGame/PokemonDiamondAndPearl Pokemon Platinum]]''[='s=] '''PokÚdex description for [[OlympusMons Arceus]]'''

A common CreationMyth {{motif}}: the world, {{God}}, or some [[OurTitansAreDifferent primordial entity]] comes into existence by hatching from an egg or similar structure.

This is generally used so that the universe's life-cycle mimics those of many of its creatures, giving the trope metaphorical significance as a symbol of life's beginning. As such, it is found in many religious stories and ancient mythologies, but it is also commonly found in many modern {{Mythopoeia}}s as a way to begin the narrative.

See also PrimordialChaos, which may be where these are located, and WorldTree, which has similar connotations.
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!!Examples:

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[[folder: Anime And Manga ]]

* This is said to be the theory behind Reality Marbles in the {{Nasuverse}} -- the MentalWorld of the magus is what's inside the CosmicEgg, and the Reality Marble is the ability to switch the world outside the egg with the world inside. This "creation" is only temporary though; since the event is an unnatural occurrence, the larger world will attempt to revert the disturbance back to normal, which is why Reality Marbles require a large amount of prana to maintain even for a few minutes.

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[[folder: Comic Books ]]

* According to one story, this is how {{Galactus}} managed to survive the last big crunch.
* This is how worlds are born in ''ComicBook/TheBooksOfMagic''. Tim restores the dying realm of Faerie by finding a world egg to hatch a new Faerie.
* ''ComicBook/BuffyTheVampireSlayer'' season 8 shows the Seed of Wonder, which has the shape of a red egg about the size of a football. According to Spike, "The world came from the Seed."

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[[folder: Literature ]]

* In ''Literature/TheGodsThemselves'' by Creator/IsaacAsimov, these are used as ''[[PoweredByAForsakenChild fuel]]''.
* One of the [[MultipleChoicePast many origins]] of the ''Literature/{{Discworld}}'' universe given by the Great Spells in ''Discworld/TheLightFantastic''. Apparently, the Cosmic Egg was "distinctly rubbery."
** And in the Literature/{{Discworld}} novel Discworld/{{Eric}}, it turns out that life was created by Rincewind (who had gone back in time) tossing away the '''Egg'''-and-Cress sandwich given to him by The Creator.
** An egg of stone (a geode) is also central to the dwarfs' origin myth which explains how the dwarfs, the humans, and the trolls were created.
* Appears in ''Literature/TauZero'' at the end of the universe, during the Big Crunch.

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[[folder: Music ]]

* Provided the name and album cover for {{Wolfmother}}'s second full album.
* {{Bjork}}'s song "Cosmogony": "And they say back then our universe was a cold black egg/Until the god inside burst out and from its shattered shell/He made what became the world we know."

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[[folder: Real Life ]]

* Resurrected as an idea in modern science with the Big Bang: for the first few Planck Times the universe was a highly-compressed [[BuffySpeak ball of proto-universal stuff]]. More often thought of as this within the big bang/big crunch model of an oscillating universe (now discredited by discovery of dark energy).

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[[folder: Webcomics ]]

* ''Webcomic/{{Homestuck}}'': Skaia more or less fits this description.

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[[folder: Religion and Mythology ]]

* OlderThanDirt: The Rig Veda (and later, some Puranas) use this to describe the universe in its early stages in HinduMythology.
* The [[http://en.wikipedia.org/wiki/Orphic_Egg Orphic Egg]] of [[http://en.wikipedia.org/wiki/Pelasgian_creation_myth#Pelasgian_creation_myth Pelasgian creation myth]] which predates ClassicalMythology and even the Greek language.
* The Taoist idea of Pangu from ChineseMythology is this trope.
* Mentioned in the ''Literature/{{Kalevala}}''.
* [[EgyptianMythology Egyptian]] [[http://www.mythome.org/creategy.html myth]].

* In Hawaiian mythology, the fire-goddess Pele carries [[EggMacGuffin an egg]] from her original home in Tahiti to the Hawaiian archipelago. The egg hatches out her fully-formed sister [[NaiveEverygirl Hi'iaka]], the goddess of dance. (In fact, Hi'iaka's much longer full name translates (very) roughly as "carried in the arms of Pele").

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[[folder: Web Original ]]

* [[http://wanderers-library.wikidot.com/eggshells Eggshells]] from TheWanderersLibrary.

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[[folder: Video Games ]]

* Rosalina's starship, in ''SuperMarioGalaxy'' has a warp field that makes it look like an egg. Given that she's apparently the overseer of the rebirth of the universe, this is likely intentional.
* Arceus is a godlike Franchise/{{Pokemon}} that was born from one of these.
** And he'll create you one with one of the [[PokemonDiamondAndPearl Sinnoh legendaries]] in a ''[[PokemonGoldAndSilver Heartgold and Soulsilver]]'' event.
* While it's never stated whether or not the universe itself hatched from them, the Cosmic Eggs of ''VideoGame/ShinMegamiTenseiStrangeJourney'' [[EndOfTheWorldSpecial have the power to remake the Earth as a world of absolute Law or Chaos.]] [[spoiler: [[TakeAThirdOption They can also be detonated in order to destroy the Schwarzwelt instead.]]]]
** [[MythologyGag By gum]], Tokyo in ''VideoGame/ShinMegamiTenseiIIINocturne'' sure is round like the inside of a cosmic egg! Which it is, and it's up to the main character to determine what kind of world will emerge from it. [[spoiler:Or he can destroy the restarter mechanism and goes on a RageAgainstTheHeavens.]]
* In ''VideoGame/OracleOfTao'', Ambrosia uses one of these to make all existence real [[spoiler: (before that, it was more a LotusEaterMachine with herself as the only real person)]].
* The Precursor stone in ''JakIIRenegade'' is the last Precursor egg.
* Several religions in TheElderScrolls have this motif.

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