No doubt, the Arabs have a sparkling influence on world thoughts. Arab sciences were on top of world civilization in the age of two great Arab dynasties: the Umayyad and the Abbasid as a continuation product of Islamic thoughts started in the time of Muhammad and the Guided Caliphs. This book briefly show the influence of Arab upon Columbus. The book is part of Ihyaa al Turath al Arabi fil Mahjar (Revival of Arab heritage in Diaspora) project supported by the Arab American Encyclopedia originated by the author.