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8 dic 19986 año aC - Ancient Sumerians created the sundial.

Descripción:

This used 12 hours per rotation, just like our clocks today. They used 12 hours because it fit nicely into 360 degrees. Also, dividing it down fit evenly into it.

Añadido al timeline:

clocks

ByLogan Nelson
14 sep 2017
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716

fecha:

8 dic 19986 año aC
Ahora mismo
~ 22027 years ago

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