<P> Arctic exploration is the physical exploration of the Arctic region of the Earth . It refers to the historical period during which mankind has explored the region north of the Arctic Circle . Historical records suggest that humankind have explored the northern extremes since 325 BC, when the ancient Greek sailor Pytheas reached a frozen sea while attempting to find a source of the metal tin . Dangerous oceans and poor weather conditions often fetter explorers attempting to reach polar regions and journeying through these perils by sight, boat, and foot has proven difficult . </P> <P> Some scholars believe that the first attempts to penetrate the Arctic Circle can be traced to ancient Greece and the sailor Pytheas, a contemporary of Aristotle and Alexander the Great, who, in c. 325 BC, attempted to find the source of the tin that would sporadically reach the Greek colony of Massilia (now Marseille) on the Mediterranean coast . Sailing past the Pillars of Hercules, he reached Brittany and even Cornwall, eventually circumnavigating the British Isles . From the local population, he heard news of the mysterious land of Thule, even farther to the north . After six days of sailing, he reached land at the edge of a frozen sea (described by him as "curdled"), and described what is believed to be the aurora and the midnight sun . While some historians claim that this new land of Thule was the Norwegian coast or the Shetland Islands, based on his descriptions and the trade routes of early British sailors, it is possible that Pytheas reached as far as Iceland . </P>

Who was the first greek explorer to reach the arctic