New evidence of Iron technology in India from about 1800 BC 02-12-11 From Wikipedia Earlier than 200,000 BC Homo ergaster: is an extinct species (or subspecies) of hominid that lived in eastern and southern Africa from the end of the Pliocene epoch to the early Pleistocene, about 1.8-1.3 million years ago.
The karstic region of the Atapuerca Mountains in Spain represents the currently earliest known and reliably dated location of residence for more than a single generation and a group of individuals.
Geological Ages and Era Precambrian–4.6 billion years ago (bya) Hadean Eon 4.6–3.8 bya Archean Eon 3.8–2.5 bya Proterozoic Eon 2.5bya–570 million years ago (mya) Phanerozoic Eon Paleozoic Era Cambrian Period Ordovician Period Silurian Period Devonian Period Carboniferous Period Permian Period–Oil Mesozoic Era Triassic Period Pangaea supercontinent Jurassic Period Dinosaurs Cretaceous Period Dinosaurs wiped out, K-T extinction event, 65.5mya Cenozoic Era Paleogene Period Paleocene Epoch Eocene Epoch Oligocene Epoch Neogene Period Miocene Epoch Pliocene Epoch Pleistocene Epoch–Humans start out here Holocene Epoch–Where we are now.
From Wikipedia Here Archaeological ages Paleolithic Introduction of stone tools 2.5 -mya Lower Middle Upper Mesolithic Some notable Mesolithic sites: Bronze Age (4000 to 1200 BC) Written history begins about 3500-3000 BC Iron Age (1200 BC) West Africa, perhaps Armenian area also.
A large number of stone tools have been found in sediment deposits in northern China.
More than 400 fragments have been found in a stratum of sediment thought to have formed 15 million years ago.