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Who were the Zapotec? Central American history

By | 2017-09-09T18:05:48+00:00 September 9th, 2017|Central America, History|

A Zapotec head The Zapotec civilization, like the Maya, grew up in the region that had been ruled by the Olmec, after the collapse of Olmec power about 500 BC. The main city of the Zapotec kings was Monte Alban (in modern Mexico). The Zapotec developed their own hieroglyphic writing system, possibly building on earlier Olmec [...]

Wheel and axle – Simple machines – Physics

By | 2017-08-17T10:52:53+00:00 August 17th, 2017|Central Asia, Physics|

An Egyptian potter uses a pottery wheel, about 2000 BC Wheels do not exist in nature, and no animals use them except people. Even people didn't use wheels until the early Bronze Age, around 3500 BC, much later than the other simple machines (the lever and the inclined plane). The earliest evidence for people using wheels comes from Sumeria (modern [...]