The search for Terra Australis Incognita

In the Western world, belief in a Cold Land—a vast continent located in the far south of the globe to "balance" out the northern lands of Europe, Asia and North Africa—had existed for centuries. Aristotle had postulated a symmetry of the earth, which meant that there would be equally habitable lands south of the known world. The Greeks suggested that these two hemispheres, north and south, were divided by a 'belt of fire', due to the general observation that the climate got warmer and warmer the further south someone travelled, and no Europeans had gone past the equator to see that this was not the case.[citation needed].

It was not until Prince Henry the Navigator began in 1418 to encourage the penetration of the torrid zone in the effort to reach India by circumnavigating Africa that European exploration of the southern hemisphere began. In 1473 Portuguese navigator Lopes Gonçalves proved that the equator could be crossed, and cartographers and sailors began to assume the existence of another, temperate continent to the south of the known world.

 
In 1570 a map by Ortelius showed the imagined link between the proposed continent of Antarctica and South America. Note also the proposed landmasses surrounding the North Pole.The doubling of the Cape of Good Hope in 1487 by Bartolomeu Dias first brought explorers within touch of the Antarctic cold, and proved that there was an ocean separating Africa from any Antarctic land that might exist.

Ferdinand Magellan, who passed through the Straits of Magellan in 1520, assumed that the islands of Tierra del Fuego to the south were an extension of this unknown southern land, and it appeared as such on a map by Ortelius: Terra australis recenter inventa sed nondum plene cognita ("Southern land recently discovered but not yet fully known").[citation needed]

European geographers connected the coast of Tierra del Fuego with the coast of New Guinea on their globes, and allowing their imaginations to run riot in the vast unknown spaces of the south Atlantic, south Indian and Pacific oceans they sketched the outlines of the Terra Australis Incognita ("Unknown Southern Land"), a vast continent stretching in parts into the tropics. The search for this great south land or Third World was a leading motive of explorers in the 16th and the early part of the 17th centuries. It has been argued that the Spaniard Gabriel de Castilla claimed to have sighted "snow-covered mountains" beyond the 64° S in 1603, but this claim is not generally recognized.

Quirós in 1606 took possession for the king of Spain all of the lands he had discovered in Australia del Espiritu Santo (the New Hebrides) and those he would discover "even to the Pole".

Francis Drake like Spanish explorers before him had speculated that there might be an open channel south of Tierra del Fuego. Indeed, when Schouten and Le Maire discovered the southern extremity of Tierra del Fuego and named it Cape Horn in 1615, they proved that the Tierra del Fuego archipelago was of small extent and not connected to the southern land.

Finally, in 1642 Tasman showed that even New Holland (Australia) was separated by sea from any continuous southern continent.
landmass.Voyagers round the Horn frequently met with contrary winds and were driven southward into snowy skies and ice-encumbered seas; but so far as can be ascertained none of them before 1770 reached the Antarctic Circle, or knew it, if they did. The story of the discovery of land in 64° S. by Dirk Gerritz on board the Blijde Boodschap in 1599 was shown to be the result of a mistake[citation needed] of a commentator, Kasper Barlaeus, in 1622.[3]