Zuan Chiabotto a venetian navigator and adventurer claims that He reached the American mainland in 1498, a year before Columbus reached the same continent. Alwyn Ruddock, an English scholar, found a letter sent by a British trader named John Day to Columbus. The letter explained that the North American continent was discovered by a sailor from the port of Bristol in 1470. Meanwhile Scandinavian scholars also considered that vikings had sailed to the coast of North America before British and Italian exploration based on archaeological findings along the places visited by their ancestor. On the other hand, Abu Raihan al-Biruni, a Muslim scientist who was born in Uzbekistan and mastered mathematics, astronomy, mineralogy, geography, cartography,
