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20 sept. 1000 av. J.-C. - Abacus and steel

Description:

The abacus is used as an everyday method of calculation by Phoenicians and Babylonians

Iron reheated with carbon is found to be much harder, being transformed into steel

Ajouté au bande de temps:

Evolution Timeline

ByDalynn Paredes
27 oct. 2017
0
0
670

Date:

20 sept. 1000 av. J.-C.
Maintenaint
~ Il y a 3028 ans

Les images:

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