Earth

"The Earth was Pink Diamond's colony. Everything was going smoothly at first. Kindergartens were incubating their first soldiers. Big, warm pieces of Quartz, like this mountain over here, were being created from its rich minerals with great success. Then — bam! One of Pink Diamond's very own Quartz soldiers started a rebellion and took it too far."

Earth, also known as "Crystal System Colony Planet Earth," is an abandoned Gem colony planet and the primary location of Steven Universe. Earth contains many native species, with the dominant species being humans. This Earth exists in an alternate universe, and while it is apparently similar, there are many differences.

Colonization Era
Over 5,750 years ago, Pink Diamond chose her first colony to be Earth. Under her leadership, Homeworld Gems travelled to Earth in Era 1 Colony Ships and began to build a variety of structures all around the planet, such as spires, arenas, temples and other buildings. Homeworld Gems also created Warp Pads, which allowed Gems to travel from place to place on Earth quickly. Warp Pads even allowed Gems to travel off-planet to other Gem colonies and the Gem Homeworld itself. A base was constructed on the Earth's moon, which was used by the Diamonds and other Gem elites to monitor and plan the Earth's colonization progress.

The primary purpose of establishing a Gem colony on Earth was for Homeworld Gems to use the planet's rich and unique organic minerals to manufacture new Gems. The first Kindergarten on Earth, referred to as the Prime Kindergarten, was established to serve the purpose of creating new Gems. With great success, the Prime Kindergarten efficiently produced new Gems, many of them being of the Quartz variety. Pink Diamond also used the Earth's materials to create a whole new class of Quartz Gems: Rose Quartzes.

While leading the Earth's colonization, Pink Diamond abducted ancient humans from their families and placed them in a human zoo, located in an unknown quadrant of space.

Some time during colonization, Pink Diamond took note of how Gem colonization was becoming harmful to the Earth and its vast population of humans and other species. Believing it was unfair to the life already present on Earth, Pink Diamond formed the secret identity of Rose Quartz. She used this form to enjoy life on Earth and rebel against Homeworld Gems, as well as her fellow Diamonds, forming the Crystal Gems for this exact purpose. The Crystal Gems were a rebel group who agreed with Rose Quartz's beliefs that the Earth was unique and worth protecting. The Crystal Gems fought The Rebellion, a 1,000-year-long war against the Homeworld Gems. The war ended after Pink Diamond faked her own death in order to live out the rest of her life as Rose Quartz. However the Homeworld Gems, including the Diamonds, are not aware of this and continue to seek vengance on Rose Quartz for shattering Pink. After Pink Diamond's alleged demise, the remaining Homeworld Gems attempted to abandon the Earth. The Diamonds then sent out the Corrupting Light as a final resort, regardless of the evacuation status.

During the Rebellion, Homeworld Gems remained mostly dominant and were thus able to continue creating Gem structures, such as the Pyramid Temple. However, halfway through the war, Homeworld Gems struggled to keep up with Rose Quartz's army, since Rose Quartz could heal her wounded allies. They created the Beta Kindergarten to quickly generate more soldiers on the ground, which made the Beta Kindergarten a rushed job, and many of the Gems manufactured there came out defective.

After Pink Diamond's alleged shattering, Homeworld Gems no longer saw Earth as a viable colony, due to the powerful Crystal Gems defending the planet. As a last resort, according to Garnet's story in "Your Mother and Mine," Yellow, Blue, and White Diamond launched the Corrupting Light on the Earth, corrupting all the rebellious Gems as well as loyal Gems who failed to evacuate the planet in time (such as Centipeetle and her crew). Rose Quartz, however, protected Garnet and Pearl under her shield. Then, unbeknownst to the Crystal Gems, Homeworld collected the shattered remains of fallen Crystal Gems, with the goal of fusing all of the Gem Shards in a power weapon dubbed 'The Cluster'. The Cluster was planted to incubate in the Earth's mantle and would eventually destroy the Earth from the inside out. Homeworld Gems created some prototypes for the Cluster and stored them in the Prime Kindergarten Control Room.

As previously stated, the Crystal Gems ultimately warded Homeworld Gems off the planet, with only 5% of the colony completed (according to Peridot). If the colony was finished, many more structures would have been built, including 89 Kindergartens, 67 spires, and several Galaxy Warp stations. Also, the Earth was to be hollowed out down to the core, with large sections of the crust removed to make the most of its resources. However, due to the Rebellion, this plan was abandoned and replaced with the plans to create the Cluster.

Geographical
Maps of the globe seen in the show consistently depict significant geographical differences from real-life Earth:
 * The Floridian Peninsula of North America is a series of small islands cut off from the mainland. Otherwise, the physical outline of North America on maps has not changed as drastically as some of the other continents.
 * The entire Central American area is fragmented in a large group of islands.
 * The eastern side of South America — loosely corresponding to Brazil — is noticeably larger than in real life, jutting out east into the South Atlantic.
 * West Africa is now covered by the ocean. In fact, the new West Coast of this alternate Africa seems to match up with the shape of the larger east coast of South America — just as in real life, the coasts of Africa and South America visibly seem to match up, because they were pushed apart by moving tectonic plates. It is possible that the mid-Atlantic fault line that separated South America from Africa is further east in the Steven Universe Earth due to differing geologic activity.
 * A large island and two smaller islands can be seen off the South Atlantic coast of eastern South America, forming an island chain between it and Africa (ending around where Nigeria would be).
 * Iceland does not exist.
 * Greenland is slightly further east than in real life, making the Baffin Bay larger.
 * Russia is missing a huge chunk of land area in the middle of Siberia — the size of Europe. Conspicuously, it is shaped like a neat circle, and a Gem facility (the Galaxy Warp according to Steven Universe: Art & Origins) is in the very center of it according to the map in the moon base.
 * This Gem facility is at the same place as the Tunguska event (a presumptive meteor airburst in 1908). Steven Universe: Art & Origins indicates that the body of water is appropriately called the Tunguska Sea.
 * The Indian Subcontinent has been almost bisected horizontally by the ocean, in effect making the southern half a separate island (separated from the mainland only by a long but narrow inlet).
 * Similar to India, Australia has been bisected vertically by the ocean, splitting it into two separate islands. The coastlines of the eastern island are what they are like in real life (except for the new western coast), but the ocean has flooded much of the western island.
 * The ocean has flooded much of southern China's coast.
 * The Balearic Islands look remarkably different, and they are located near the northern coast of Africa, instead of the southern coast of Spain.
 * The Great Lakes seem to be more interconnected.
 * Japan's islands seem fused together, with the northernmost (Hokkaido) forming a land bridge to mainland Asia through Sakhalin, but it is not clear if they are intentional or just due to the outlines of land masses appearing blurry on a large world map in this animation style.
 * The Philippines appear to be much further west, almost touching Borneo.
 * The coastline of Eastern Asia has drastically changed.
 * The Polynesian islands are in many different positions. Indonesia and Malaysia are slightly closer together, and there are multiple new islands.
 * As seen from the Moon, the shadow and light from the sun on Earth meet at the equator, which may imply the planet has an entirely different rotation and axis than real life. In other episodes, the shadows are normal. This is possibly due to animation errors.

Facets
Homeworld Gems appear to have divided up the Earth into different sections, labeling them as 'Facets'. Each Facet name is followed up with a number which differentiates the several Facets. One of the Colony Plans was to have a Galaxy Warp in each Facet.
 * Facet 5 – The Prime Kindergarten is located in Facet 5.
 * Facet 6 – Eyeball states that she was in Facet 6 halfway through the Rebellion when Jasper formed.
 * Facet 9 – The Beta Kindergarten is located in Facet 9.

Social/Political/Historical
There are several historical differences between Earth in the show and Earth in real life.
 * Delmarva is a state, in which Beach City is located. In real life, this is just a term for the large peninsula on the east side of Chesapeake Bay, because it is shared by the states of Delaware, Maryland, and Virginia.
 * In real life, the U.S. state of Pennsylvania is nicknamed "the Keystone State". In the Steven Universe world, it is officially named "Keystone" (though otherwise, it has the same borders as real-life Pennsylvania).
 * Kansas is a major hub of the movie industry, with Kansas being SU&#39;s analog for Hollywood. It could also be that, because state names in the U.S. are different, Kansas may be the name of California and vice versa. Or could be a reference to Strataca, a salt mine museum in Hutchinson, Kansas, owned by the Hutchinson Salt Company. The company is internationally known for its highly protective, secured storage capabilities, including being home to the original camera negative of many famous movies.
 * The real-life state of "New Jersey" is named simply "Jersey".
 * The real-life state of "New York" is named "Empire State" (as seen on official road signs). As with Pennsylvania/Keystone, "the Empire State" is the official nickname of New York state in real life.
 * Major American cities include Charm City, Wilmington, and Empire City.
 * Charm City is a real-life nickname for Baltimore, Maryland.
 * Wilmington is a portmanteau of the names of Wilmington, Delaware and Baltimore, Maryland.
 * Empire City is their direct geographical analog of New York City. "Mr. Greg" confirmed that it contains locations like Brooklyn and Bowery, areas in real-life New York City. Culturally/historically, however, "Empire City" is sort of "a fusion of New York City, Paris, and Las Vegas".
 * Currency appears different in this timeline: some coins have Gadsden-like snake symbols or pictures of a woman resembling Pearl. $1 bills have images of an upward-pointing diamond on the left and a Gadsden-like snake symbol on the right. $3 bills also exist in this world.
 * Instead of the FBI, there is the Department of Justice: Federal Bureau. Their symbol has 12 stars instead of 13, and instead of a shield surrounded by laurels, there is a snake resembling the one from the Gadsden flag, accompanied by a waning crescent moon symbol.
 * The Canadian flag is green and white, instead of being red and white.
 * Well-known holidays such as Christmas or Halloween do not exist as such in this world (though there are some generically similar holiday periods).
 * Judaism still exists in this world, although the previously mentioned lack of Christmas calls into question whether the other Abrahamic faiths (Christianity and Islam for instance) are practiced.
 * Korea exists and shares the same flag as South Korea, though it is unknown if it is split into North and South governments like in real life.
 * Bulgaria is mentioned in Sadie Killer, indicating it still exists and apparently produces a certain type of horror films enjoyed by an underground audience.
 * While European Russia is intact, it is unknown if Russia exists as a solely European entity.
 * Ghana is confirmed to exist. However, it's unknown where the country is located on Steven Universe&#39;s Earth, as real-life Ghana is located in Western Africa, a location in Steven Universe that's underwater.

Environmental
Environmental influences either caused by the Gems or by geological differences.
 * Pears are not very appreciated and are also very uncommon, growing only on the coasts of Eastern Europe and North Africa.
 * The mass production of durian juice would imply that the durian is much more common.

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