Archaeologists in Kenya have dug up some of the oldest stone tools ever used by ancient humans, dating back around 2.9 million years.
They say the discovery is evidence that tools were used by other branches of early humans, not just the ancestors of Homo Sapiens as scientists have previously thought.
Researchers say two big fossil teeth found at the site in Kenya belong to an extinct human cousin, known as Paranthropus.
The team found evidence to suggest the tools were used to butcher hippos and pound plant materials like tubers and fruit.
