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In page History of Cape Verde:

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In 1456, Alvise Cadamosto, Antoniotto Usodimare (Venetian and Genoese captains, respectively, in the service of Prince Henry the Navigator) and an unnamed Portuguese captain discovered some of the islands. During the next decade, Diogo Gomes and António de Noli (also captains in the service of Prince Henry) discovered the remaining islands of the archipelago.[citation needed] When they first landed in Cape Verde, the islands were barren of people but not of vegetation.