The Lower Paleolithic began with the appearance of the first stone tools in the world. Formerly associated with the emergence of "Homo habilis", some 2.8 million years ago, this date has been pushed back significantly by finds of the early 2000s, the Oldowan or Mode 1 horizon, long considered the oldest type of lithic industry, is now considered to have developed from about 2.6 million years ago, with the beginning Gelasian (Lower Pleistocene), possibly first used by australopithecine forbears of the genus "Homo" (such as "Australopithecus garhi").