The Lower-Paleolithic Period
The Lower-Paleolithic is the earliest and longest subdivision of the Paleolithic or Old Stone Age. It began approximately 3.3 million years ago with the first evidence of stone tool production and lasted until about 300,000 years ago. This era witnessed the emergence of several early human ancestors, including Australopithecus, Homo-habilis, and Homo-erectus. Detailed chronological data can be found at the Encyclopaedia Britannica.
Technological Evolution
The period is characterized by the development of two primary lithic industries. The Oldowan industry, associated with Homo-habilis, consisted of simple flakes and choppers. This was followed by the more advanced Acheulean industry, which is famous for the production of bifacial handaxes. These technological shifts are discussed extensively in the Nature Education Knowledge Project. The transition to the Acheulean marked a significant cognitive leap for Homo-erectus.
Geographic Expansion and Lifestyle
During the Pleistocene epoch, hominins began to migrate out of Africa and into Eurasia. Sites like Olduvai-Gorge and Dmanisi provide critical evidence of early human behavior, including scavenging and the eventual move toward active hunting. According to the Smithsonian National Museum of Natural History, this period also saw the first controlled use of fire, which allowed for better protection and cooked diets. These social and biological changes laid the foundation for the Middle-Paleolithic.