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Human Evolution
Early Humans
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Toba catastrophe theory

According to the Toba catastrophe theory, modern human evolution was affected by a recent, large volcanic event. Within the last three to five million years, after human and other ape lineages ... > more
Ancient Civilizations
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Origin of Life

Castle

A castle is a building, or set of buildings, fortified for defence against an enemy. The term is most often applied to a small self-contained ... > more
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Earthquake

An earthquake is the result of a sudden release of stored energy in the Earth's crust that creates seismic waves. Earthquakes are accordingly measured with a seismometer, commonly known as a ... > more

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