Archaeologists have discovered a large collection of ancient tools crafted out of hippopotamus and elephant bones, pushing back the age of bone tool kits made by ancient humans a million years.

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

(CNN) — Archaeologists have uncovered a collection ... the study authors said. While the bone tool kits found later in Europe, dated to 400,000 years ago, are much more refined, the Olduvai ...

The bone tools measure up to around 16 inches (40 centimeters), with the largest being a sharp blade made from the humerus of an elephant.

Even older artifacts recovered at Olduvai Gorge come from a bone tool kit, the scientists say ... tools resemble pear-shaped stone hand axes. Archaeologists consider stone hand axes the main ...