Chronic myeloproliferative diseases. Chronic myeloproliferative diseases are caused by an overabundance of differentiated bone marrow cells that result in the accumulation of erythrocytes, granulocytes, monocytes or platelets. Polycythemia Vera. This condition is marked by an overproduction of RBCs.
Isabela Island, Galapagos. Isabela lies in the heart of the Galapagos Islands. Hidden past the horizon, the archipelago's largest island keeps pure, protected and distant from the ingenuity of man.
Image copyright Image caption Isabela Island is the largest in the Galapagos archipelago. The volcano lies on the northern tip of Isabela Island, the archipelago's largest. It is 115km (70 miles) from Puerto Villamil, the only population centre on the island.