The article discusses recent findings that suggest some of the earliest ancestors on Earth used tools millions of Years Ago. Stone tools were found at two Kenyan sites, one of which is the oldest example of such technology ever found. The study authors suggest that the tools were likely used to process a variety of plant and animal tissues. The article also mentions that stone tools were eventually replaced 1.7 million years ago, and East Africa was a "boiling cauldron of environmental change" at the time.

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