Before revision: Fashioned with handles for pulling or pushing, it forms a prehistoric plough, and is also described as a type of hoe.Encyclopædia Britannica, Inc. Retrieved March 26, 2015, from Britannica.com website: Digging stick
After revision: Digging sticks more than 170,000 years old, made of boxwood by Neanderthals, have been found in Italy.Fashioned with handles for pulling or pushing, it forms a prehistoric plough, and is also described as a type of hoe.Encyclopædia Britannica, Inc. Retrieved March 26, 2015, from Britannica.com website: Digging stick