Hand Axe Made 1.4 Million Years Ago Shows Unexpected Sophistication
The 3-D symmetry and sharpened tip of the rare bone-based artifact shows advances only observed in sites half a million years later
About 1.4 million years ago a hominin in what is today Ethiopia painstakingly modified a hippopotamus bone into a hand axe, demonstrating command of advanced "Acheulean technique” that had only been thought to have developed half a million years later.
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