Before revision: thumbnail| The Ishango bone on exhibition at the Royal Belgian Institute of Natural Sciences The Ishango bone, discovered at the "Fisherman Settlement" of Ishango in the Democratic Republic of Congo, is a bone tool and possible mathematical device that dates to the Upper Paleolithic era.
After revision: The Ishango bone on exhibition at the Royal Belgian Institute of Natural Sciences The Ishango bone, discovered at the "Fisherman Settlement" of Ishango in the Democratic Republic of Congo, is a bone tool and possible mathematical device that dates to the Upper Paleolithic era.