A zigzag engraving on a mussel's shell may transform scientific understanding of what has long been considered a defining human capacity: artistic creativity. Until now, the earliest evidence of geometric art was dated from 70,000 to 100,000 years ago.
But new analysis of an engraving excavated from a riverbank in Indonesia suggests that it's at least 430,000 years old - and that it wasn't made by humans, scientists announced Wednesday. At least it wasn't made by humans as most people think of them, meaning Homo sapiens.
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