Copper age (20 feb 2300 anni – 21 giug 3500 anni)
Descrizione:
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]Aggiunto al nastro di tempo:
Data:
20 feb 2300 anni
21 giug 3500 anni
~ 1201 years
