科研之友
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<正>1 Around 1.4 million years ago, early human relatives crafted mysterious stone spheroids (球体) in the Middle East in attempts to make perfect spheres, a new study found. The finding showed the intention of early humans to impose a symmetry (对称) on the stones, the researchers suggested.“It’s possible these deliberately spherical stones had some sort of functional advantage over naturally rounded stones available in the landscape,” study lead author Antoine Muller,
