According to a statement released by University College London, a collection of 27 fossilized bone artifacts made by hominins in Olduvai Gorge 1.5 million years ago represents the oldest known systematic production of bone tools. The objects, which were fashioned out of the limbs of large mammals such as hippos and elephants, may have been used to process animal carcasses into food. Although early human ancestors first began to make stone tools during the Oldowan age, which stretched from 2.7 million years ago to 1.7 million years, it was previously thought that toolmaking with bone material only began to develop around 500,000 years ago.

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