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30 mar 2400 año aC - Tech: Abacus Invented
Descripción:
Abacus: the first known calculator, the abacus, was invented in Babylonia
Añadido al timeline:
12 nov 2017
0
0
1024
Myopia (Linear Life)
fecha:
30 mar 2400 año aC
Ahora mismo
~ 4427 years ago