Early humans began crafting stone tools more than 3 million years ago by chipping off flakes to form shapes and sharp edges in a process known as knapping. There was previously no evidence that our ancestors transferred those knapping skills to bone until around 400,

The oldest human-crafted bone tools on record are 1.5 million years old, a finding that suggests our ancestors were much smarter than previously thought, a new study reports. The tools, made from hippo and elephant leg bones, were discovered at Olduvai Gorge in Tanzania and are a million years older than any previously found shaped bone tools.

Scientists discovered world's oldest known bone tools in Tanzania, revealing early human intelligence and innovation 1.5 million years ago.

Early humans were regularly using animal bones to make cutting tools 1.5 million years ago. A newly discovered cache of 27 carved and sharpened bones from elephants and hippos found in Tanzania's Olduvai Gorge site pushes back the date for ancient bone tool use by around 1 million years.

A cache of 1.5 million-year-old bone tools uncovered in Tanzania suggest ancient human ancestors were capable of critical thinking and advanced craftsmanship.

An assemblage of tools found in Tanzania that was fashioned about 1.5 million years ago from the limb bones of elephants and hippos reveals what scientists are calling a technological breakthrough for the human evolutionary lineage - systematic production of implements made from a material other than stone.

Deep in a trench in Tanzania, researchers found dozens of tools crafted from animal bones some 1.5 million years old.