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570 BCE
560 BCE
550 BCE
540 BCE
530 BCE
520 BCE
510 BCE
500 BCE
490 BCE
480 BCE
570 BCE - 478 BCE: Life of Xenophanes of Colophon; claim of One God as the First Cause of existence.
500 BCE: Xenophanes discovers sea shells on mountains and deducts that the whole earth must once have been covered with water.