There were many political and technological changes that prompted the world explorations and . The Portuguese were the main contributors to the technological changes that lead to the . However, the change of the political structure of Spain ultimately lead to the discovery. There were many technological changes that the Portuguese contributed. First of all they observed the way the Arab vessels were designed and then improved on them to make their own ships faster. They also created the caravel vessel by "increasing the ratio of beam (wid ....