Copper Age (1 gen 6000 anni a. C. – 1 gen 1200 anni a. C.)
Descrizione:
 chemists in this age were only interested in materials that had a value to humans. this included metals like gold because it didn't tarnish from its attractive colour, and was soft enough to be made into wire. copper was also majorly used as well during this time because it could be used to make pots, tools, jewellery, coins and was strong enough to produce weapons. 
Aggiunto al nastro di tempo:
Data:
1 gen 6000 anni a. C.
1 gen 1200 anni a. C.
 ~ 4803 years