The prehistoric period of human history which spans the time from around 2.5 million years ago when the first evidence of craft and use of stone tools by hominids appears in the current archaeological record, until around 300,000 years ago:
Lower Paleolithic
The Paleolithic Age, a prehistoric period of human history distinguished by the development of the most primitive stone tools discovered, contains three subdivisions:
Lower Paleolithic [2.5 million to 300,000 years ago]
Middle Paleolithic [300,000 to 30,000 years ago]
Upper Paleolithic (or Late Stone Age) [40,000 and 10,000 years ago]
