The Olduvai Gorge in Tanzania is an important paleoanthropological site, often called "the Cradle of Humanity," due to the numerous hominin fossils and stone tools discovered there. These discoveries provide insights into the behavior and technological capabilities of early humans. Tool use is a defining characteristic of the human lineage, with early tools typically made of stone. - Excavations at Olduvai Gorge in Tanzania unearthed bone tools dating back 1.5 million years. - These tools demonstrate that early humans were regularly using animal bones to create cutting implements. - The discovery revises the timeline for when human ancestors began utilizing animal bones as tools. - The bone tools found in Tanzania are the oldest of their kind, upending previous understandings of tool manufacturing in East Africa. - The use of bone tools highlights the cultural innovations of ancient hominids.