// todo need optimize like in event.jsp. Add indexing or not indexing this page. Begning of Bronze age (20 jul 3000 año aC – 20 jul 1200 año aC) (Cinta de tiempo)

Begning of Bronze age (20 jul 3000 año aC – 20 jul 1200 año aC)

Descripción:

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.