Polycythemia Vera. This slow-developing disease occurs when bone marrow produces too many red blood cells, which can lead to thickening of the blood. The condition is thought to be caused in part by a mutation in a gene called JAK2, which regulates the production of various types of blood cells, keeping them in proper balance.
Hilly landscapes and cathedrals dominate much of Andalusia, Spain. The Iberian Peninsula, predominately occupied by the European countries of Spain and Portugal, lies in southwestern Europe. With an area of 582,000 square kilometers, its is the third largest peninsula in the continent.
The Iberian Peninsula, 1491. A map of the Iberian Peninsula in 1491, just prior to the surrender of Granada by Muhammad XII to Ferdinand and Isabella, king and queen of Castile and Aragon (January 2, 1492). The map shows Portugal, the frontier with Gascogne, France, the Nasrid K...egional European maps of the Iberian Peninsula region from the Maps ETC collection. This includes physical and political maps, early history and empires, WWI maps, climate maps, relief maps, vegetation maps, population density and distribution maps, cultural maps, and economic/resource maps.