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Fortresses, soldier housing, and roads from Egypt’s Ptolemaic and Roman eras found in Sinai, revealing military life over ...
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Copernicus may have leaned on ancient Muslim astronomer in developing his cosmological systemCopernicus's model is called sun-centered or heliocentric ... first astronomer to have successfully challenged the Ptolemaic cosmological system of planets revolving around Earth and corrected ...
Copernicus’s model is called sun-centered or heliocentric ... astronomer to have successfully challenged the Ptolemaic cosmological system of planets revolving around Earth and corrected ...
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