Travel with CALLIOPE back to 1494 when Portugal and Spain officially divided the world between themselves. Read how Prince Henry the Navigator and his school of navigation sparked the imagination of Europe's monarchs and navigators, leading to the great age of discovery. Find out why conflicts arose between the countries of Europe, what role the pope and Papal Bulls played, how Isabel's and Ferdinand's marriage affected Spain and the search for a route west to China, who the other leading personalities were, and why the Treaty of Tordesillas was necessary. Find out, too, how the effects and influence of this agreement still affect the world today. To bring you closer to the people who sailed the seas at that time, we have included articles on the types of vessels the explorers used, as well as the charts and navigational devices they had. Two activities further help you appreciate their difficulties and triumphs - learn how to make a map and to chart your position by the stars. Join us for this exciting issue!