A Diver Swam 140 Metres Into A Flooded Mine. The Charcoal Is 4,400 Years Old.
The gold in Ur's tablets came out of a hill in the Transvaal, and nobody could say when. A diver went 61 metres under its waterline for charcoal. Two laboratories put it at 2380 to 2335 BCE. The tablet is dated 2340.