Around 2 million years ago at Olduvai Gorge in Tanzania, early hominins created stone tools classified as Oldowan industry. These tools, including sharp-edged flakes and cobble choppers, were made by striking one stone against another. Toolmakers selected specific materials—quartzite for cutting edges and basalt for durability—demonstrating technological decision-making. The tools were used for processing animal carcasses and plant materials. Excavations by Mary and Louis Leakey revealed these manufacturing techniques, which formed the foundation for subsequent technological developments.