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
Four Shores Four Shores Four Shores (released March 2006) is an album from the Latvian band Brainstorm. It is the fourth album by the band in English and follows the Latvian version of this album Četri krasti, which was released in May 2005. The album contains 12 songs, from which 10 are in English and 2 in Russian. The lead single of this album "Thunder without Rain" became popular in Eastern Europe and video of this song had a heavy airplay on MTV Europe and European VH1. In late 2006, "Tin Drums" reached the #1 position in the MTV Baltic Charts. A