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Artifacts are seen at the exhibition "Look Across: A Settlement on Keros 4,500 years Ago" at Athens Municipal Gallery in Athens, Greece, on June 1, 2021. (Xinhua/Marios Lolos)
Artifacts are seen at the exhibition "Look Across: A Settlement on Keros 4,500 years Ago" at Athens Municipal Gallery in Athens, Greece, on June 1, 2021. (Xinhua/Marios Lolos)