“Stone tools found from 2011 to 2014 at the Lomekwi archeology site near Lake Turkana in Kenya, are dated to be 3.3 million years old, and predate the genus Homo by about one million years.”
“In contrast to an Oldowan tool, which is the result of a fortuitous and probably unplanned operation to obtain one sharp edge on a stone, an Acheulean tool is a planned result of a manufacturing process.”