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The stories vary on the other details about humanity's creation, but it was a tradition commonly believed in ancient China that she created commoners from brown mud. [5] A story holds that she was tired when she created "the rich and the noble", so all others, or "cord-made people", were created from her "dragg[ing] a string through mud". [6]
By the Warring States Period at the end of the Zhou (3rd century BC), the Chinese explained the Earth's axial tilt, the northwestern direction of celestial bodies, and the southeastern tendency of major Chinese rivers through a legend about a great water god or monster named Gonggong who damaged Mount Buzhou after losing a battle for leadership ...
The first eon in Earth's history, the Hadean, begins with the Earth's formation and is followed by the Archean eon at 3.8 Ga. [2]: 145 The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in rocks to about 4.4 Ga, [34] [35] [36] soon after the formation of the Earth's crust and the Earth itself.
German chemist Andreas Sigismund Marggraf synthesized the earth of alum by boiling clay in sulfuric acid and adding potash in 1754. [16] He realized that adding soda, potash, or an alkali to a solution of the new earth in sulfuric acid yielded alum. [21] He described the earth as alkaline, as he had discovered it dissolved in acids when dried.
Earth's outer core is a fluid layer about 2,260 km (1,400 mi) thick, composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle. [ 1 ] [ 2 ] [ 3 ] The outer core begins approximately 2,889 km (1,795 mi) beneath Earth's surface is at the core-mantle boundary and ends 5,150 km (3,200 mi) beneath Earth's ...
Earth formed approximately 4.6 billion years ago from a disk of dust and gas orbiting the newly formed Sun. It formed via accretion, where planetesimals and other smaller rocky bodies collided and stuck, gradually growing into a planet. This process generated an enormous amount of heat, which caused early Earth to melt completely.
The historic Chandrayaan-3 mission, which made India the fourth country to land on the moon one year ago Friday, has uncovered new evidence that supports a theory about early lunar history.
Earth's mantle is a layer of silicate rock between the crust and the outer core. It has a mass of 4.01 × 10 24 kg (8.84 × 10 24 lb) and makes up 67% of the mass of Earth. [ 1 ] It has a thickness of 2,900 kilometers (1,800 mi) [ 1 ] making up about 46% of Earth's radius and 84% of Earth's volume.