Kushite ancestors built speos during the Bronze Age between 3700 and 3250 BC.Bloomeries and blast furnaces were also created during the 7th centuries BC in Kush.
Lelangit saking  Kushite ngwangun speo selami Zaman Perunggu pantaraning 3700 miwah 3250 SM. Bunga miwah tanur tegeh taler kakaryanin selami abad ka-7 SM ring Kush.