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
Africa-Asia Confidential coverage in the mainstream press. With its investigations into corruption and political intrigue, "Africa-Asia Confidential" is read monthly by people in a wide range of institutions and by individuals around the world. The newsletter gives insight into the importance of the increasing connections of China, India, Japan and South Korea with Africa and the facts about commercial, political and diplomatic relations. Africa-Asia Confidential Africa-Asia Confidential was first published in November 2007 by the same group that owns "Africa Confidential", Asempa Limited of Cambridge. The newsletter was founded in response to the growing political and economic relations between Africa and Asia,