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<div class="entry-excerpt-in"> <p>Other hominins may have also been processing otherwise inedible foods with this technology, added Thomas Plummer of Queens College</p> </div> <div class="entry-content"></div>
Kenyan archeologists find 2.9 million years old stone tools believed to be used by the earliest humans.
Oldowan tools were used to process many foods, including ancient hippopotamuses, at least 600,000 years earlier than previously thought.
Archaeologists in Kenya have dug up some of the oldest stone tools ever found, but who used them is a mystery. In the past, scientists assumed that our direct ancestors were the only toolmakers.
Stone Age discovery fuels mystery of who made early tools