An Australian soldier discovered a handful of coins in the sand. They date back to the 900s to 1300s, and come from the former Kilwa sultanate, on an island off Tanzania. They were the first coins ever produced in the area and have only twice been found outside Africa. Archaeologists have long suspected there may have been early maritime trading routes that linked East Africa, Arabia, India and the Spice Islands even 1,000 years ago. Or the coins could’ve washed ashore after a shipwreck.