Ancient humans used bone tools one million years earlier than thought

Bone tools discovered in Tanzania reveal that ancient humans consistently used such tools at least one million years earlier than we thought. The previous estimate put the earliest use of bone tools at around 400,000 years ago. The new findings smash that record, dating the implements to around 1.5 million years ago. The utensils were crafted from elephant, hippopotamus and bovine bones, and were probably used for tasks such as butchering and digging out tubers.