A new study says early humans were regularly using animal bones to make cutting tools 1.5 million years ago. A cache of 27 carved and sharpened bones from elephants and hippos found in Tanzania pushes back the date for ancient bone tool use by around 1 million years. Early people also made simple tools from stones as early as 3.3 million years ago. Experts say the discovery published Wednesday in Nature reveals that early humans had more complex tool kits than previously thought. The bone tools date from more than a million years before Homo sapiens arose around 300,000 years ago. A new study says early humans were regularly using animal bones to make cutting tools 1.5 million years ago. A cache of 27 carved and sharpened bones from elephants and hippos found in Tanzania pushes back the date for ancient bone tool use by around 1 million years. Early people also made simple tools from stones as early as 3.3 million years ago. Experts say the discovery published Wednesday in Nature reveals that early humans had more complex tool kits than previously thought. The bone tools date from more than a million years before Homo sapiens arose around 300,000 years ago. AP Technology and Science
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