Sea in culture of barbarian invaders and knowledge of geography took a backward step. In the seventh century, Isidore of Seville produced a "wheel map" in which Asia, Africa and Europe were arranged like segments in an orange, separated by the "Mare Mediterranean", "Nilus" and "Tanais" and surrounded by "Oceanus". It was not until the fifteenth century that Ptolemy's maps were used again and Henry the Navigator of Portugal initiated ocean exploration and maritime research. Encouraged by him, Portuguese navigators explored, mapped and charted the west coast of Africa and the Eastern Atlantic and this knowledge prepared the way for the great voyages
Europe-Asia Studies are accessible via Informaworld. According to the "Journal Citation Reports", the journal has a 2017 impact factor of 0.842, ranking it 115 out of 161 journals in the category "Political Science". Europe-Asia Studies Europe-Asia Studies is an academic peer-reviewed journal published 10 times a year by Routledge on behalf of the Institute of Central and East European Studies, University of Glasgow, and continuing (since vol. 45, 1993) the journal Soviet Studies (vols. 1-44, 1949–1992), which was renamed after the dissolution of the Soviet Union. The journal focuses on political, economic and social affairs of the countries of the former Soviet