The Egyptian Sand Sea is located in Africa's Libyan Desert. The three sandseas contain dunes up to 110m in height and cover ~25% of the Libyan Desert. The dunes were created by the wind.
... Passage in a single ship
Roy Chapman Andrews, (1884-1960), US explorer
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Vasco Nunez de Balboa, (c. 1475-1519), (- Spanish, first to sight the Pacific Ocean, ...