Lower Paleolithic is a term used to describe the earliest period of the Stone Age, which dates back to around 2.6 million years ago. This period is characterized by the emergence of stone tools and the use of fire. Synonyms for Lower Paleolithic include Early Stone Age, Old Stone Age, and Lower Olduvai Gorge. The term has been used to refer to different regions and archaeological sites, such as the Lower Paleolithic excavations in Africa, Asia, and Europe. Other terms that are commonly used in association with Lower Paleolithic are Acheulean and Oldowan, which describes the types of tools used by early humans during this period.