Earth (Earth-9791)

Topography
"Earth. Man, what a shithole."

- - Ron Johner Earth is the homeworld of humanity, and thus is the archetype by which the species measure other planets they colonize regarding hability, from climate to atmosphere, among many others. The goal of colonizing planets across the Orion Arm of the Milky Way galaxy is to create similar environments to that of Earth so humans can live on them: there were a total of thirty human colonies by 2552.

Earth is estimated to be approximately 4.5 billion years old. It has a solid iron core at its center, which possess a liquid later through it. This creates an effect that generates powerful magnetosphere, which has kept Earth from losing all of its water and other organic volatile compounds. The planet's core is surrounded by semi-fluid magma, where solid, light crust floats. The planet is incredibly active geographically, possessing numerous plate tectonics that causes volcanoes and natural springs to dot in the surface, as well as earthquakes.

Earth lies in Sol's liquid water zone, with water being widely found in oceans that cover 70% of the planet. The other 30% encompasses the terrain surface, which is divided among four landmasses (that humans separate into seven continents: Africa, Antarctica, Asia, Europe, North America, South America, and Australia) and thousands of islands across the oceans. The planet is maintained by a thin atmosphere, maintained by the planet's surface biomass, having 78% nitrogen and 21% oxygen, while the remaining gases contain a mix of argon, carbon dioxide, and water vapor.

Earth spins on its axis once in every 23 hours, 56 minutes, and 4 seconds. The axis is tilted 23° from its orbital plane, causing seasonal changes as it orbits Sol. Earth holds a large amount of natural resources, ranging from minerals to other substances produced by the planet's biomass, such as petroleum, coal, wood, and natural gases. These resources were continuously used by humans to develop their technology, but as time went by, they became exhausted, which led to the colonization of other planets in the Sol system, and later on, outside of it.

Terrain and climate
Earth's geological activity led the planet to possess a varied terrain across its surface. Plate tectonics and erosion control the process of formation of surface features, these include mountain ranges, plains, valleys, mesas, and canyons, which are commonly found in deserts, while tundra, forests, icecaps, and grasslands are found at the poles. Earth can be divided into three major climate zones: the tropics, ranging from each side of the Equator, the polar regions at North and South Poles, and the temperate zones located in-between the former two. These in turn are divided into minor zones, which vary depending on their distances in relation to the Equator, their proximity to large water bodies, and local geography, such as mountains.

Humans started modifying the planet's terrain after their discovery of agriculture around 8000 BCE, which allowed for the creation of massive cities linked by organized trade routes that stretch for thousands of kilometers between land and sea. In the 19th century, humanity started to alter the climate of the planet by introducing industrial by-products. By the 21st century, Earth's environment started to severely degrade, leading to environmental crisis and overpopulation concerns, but still remained habitable.

Native species

 * Human
 * Alligator
 * Bat
 * Bear
 * Bison
 * Blue whale
 * Bonobo
 * Cat
 * Chicken
 * Clam
 * Cockoach
 * Crab
 * Cricket
 * Crocodile
 * Dodo (extinct)
 * Dog
 * Eagle
 * Elephant
 * Firefly
 * Fish
 * Gigantopithecus (extinct)
 * Goat
 * Gorilla
 * Honey badger
 * Honey bee
 * Horse
 * Jackal
 * Koi
 * Lizard
 * Louse
 * Mammoth (extinct)
 * Mantis
 * Mastodon (extinct)
 * Mongoose
 * Monkey
 * Moose
 * Mounring wabler
 * Otter
 * Owl
 * Parrot
 * Pelican
 * Penguin
 * Pigeon
 * Rat
 * River dolphin
 * Rhinoceros
 * Scorpion
 * Seagull
 * Snail
 * Snake
 * Spider
 * Squid
 * Squirrel
 * Starling
 * Swallow
 * Trout
 * Tuna
 * Turkey
 * Turtle
 * Vulture
 * Warthog
 * White sturgeon
 * Wildebeest
 * Wolf
 * Wolverine
 * Worm
 * Zebra