Igbo Ukwu is a place which is situated in the Nigerian state of Anambra that lies in the south eastern part of the country. This place has 7 villages of its own. The elite burial there is notable for the evidences of copper alloy or bronze. This is found in the sub Saharan Africa. The excavation have also found bronze artifacts there.
So sound travels 1 kilometer in roughly 3 seconds and 1 mile in roughly 5 seconds. When you see the flash of a lightning bolt, you can start counting seconds and then divide to see how far away the lightning struck.
