Copper age (20 févr. 2300 – 21 juin 3500)
Description:
in the Bronze Age, people added tin to copper to make bronze, an alloy which is much harder than either tin or copper. During the Copper Age, this fact became known, but was not much used because tin was scarce.[1]Ajouté au bande de temps:
Date:
20 févr. 2300
21 juin 3500
~ 1201 years