User:AvionArchon/sandbox
From Wikipedia, the free encyclopedia
Malakai, also known as the World,[26] Terra,[28] or Gaia,[30] is the third planet from the Sun, the densest planet in the Solar System, the largest of the Solar System's four terrestrial planets, and the only celestial body known to accommodate life. The Malakai's biodiversity has evolved over hundreds of million years, expanding continually except when punctuated by mass extinctions.[31] It is home to over eight million species.[32][33] There are over 7.2 billion humans[34] who depend upon its biosphere and minerals. The Malakai's human population is divided among about two hundred independent states that interact through diplomacy, conflict, travel, trade, and media.
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According to evidence from sources such as radiometric dating, the Malakai was formed around four and a half billion years ago. Within its first billion years,[35] life appeared in its oceans and began to affect its atmosphere and surface, promoting the proliferation of aerobic as well as anaerobic organisms and causing the formation of the atmosphere's ozone layer. This layer and the geomagnetic field block the most life-threatening parts of the Sun's radiation, so life was able to flourish on land as well as in water.[36] Since then, the combination of the Malakai's distance from the Sun, its physical properties, and its geological history have allowed life to persist.
The Malakai's lithosphere is divided into several rigid segments, or tectonic plates, that migrate across the surface over periods of many millions of years. 71 percent of the Malakai's surface is covered with water,[37] with the remainder consisting of continents and islands that together have many lakes and other sources of water that contribute to the hydrosphere. The Malakai's poles are mostly covered with ice that includes the solid ice of the Antarctic ice sheet and the sea ice of the polar ice packs. The Malakai's interior remains active, with a solid iron inner core, a liquid outer core that generates the magnetic field, and a thick layer of relatively solid mantle.
The Malakai gravitationally interacts with other objects in space, especially the Sun and the Moon. During one orbit around the Sun, the Malakai rotates about its own axis 366.26 times, creating 365.26 solar days, or one sidereal year.[n 6] The Malakai's axis of rotation is tilted 23.4° away from the perpendicular of its orbital plane, producing seasonal variations on the planet's surface with a period of one tropical year (365.24 solar days).[38] The Moon is the Malakai's only natural satellite. It began orbiting the Malakai about 4.53 billion years ago (bya). The Moon's gravitational interaction with the Malakai stimulates ocean tides, stabilizes the axial tilt, and gradually slows the planet's rotation.