Related by context. Frequent words. (Click for all words.) 56 Ernest Shackleton 55 Antarctic Expedition 55 Sir Ernest Shackleton 52 Antarctic expedition 49 polar explorer 49 Robert Peary 49 explorer 48 Arctic explorer 46 explorers 45 Roald Amundsen 45 Pen Hadow 44 ICESat 44 Sir Ranulph Fiennes 44 expedition 44 fabled Northwest Passage 43 HMS Beagle 43 Weddell Sea 43 Antarctic 43 IODP 43 IPY 42 polar expedition 42 polar explorers 42 Ferdinand Magellan 42 Sir Ranulph 42 circumnavigation 41 Around Alone 41 Antarctica 41 Jamestown colony 41 conquered Everest 41 Reinhold Messner 41 Ross Ice Shelf 41 paleoclimate 41 transatlantic voyage 41 expeditions 41 Everest expedition 41 orbiting Mars 40 aviator Charles Lindbergh 40 scaled Mount Everest 40 circumpolar 40 Beringia 40 Glorious Revolution 40 cosmonaut Yuri Gagarin 40 adventurer 40 Antarctic Territory 39 Everest Expedition 39 Royal Geographical Society 39 conquer Everest 39 Lundin Petroleum AB 39 Juha Kankkunen 39 discoverer 39 Hiram Bingham 39 Heyerdahl 39 summited Everest 39 Geographic Society 39 Minotaur IV 39 Mars Pathfinder 39 Antarctic Treaty 39 Geographical Society 39 Apollo Soyuz 39 Hempleman Adams 39 Expedition 39 Snohvit 38 Catlin Arctic 38 oceanic crust 38 Apollo lunar 38 Aurelian Oil & 38 Alfred Russel 38 planetary missions 38 classical antiquity 38 Artur Chilingarov 38 aviator Amelia Earhart 38 glaciations 38 Antartica 38 Skygold 38 voyaging 37 Vinson Massif 37 Ocean Race 37 Virgin Atlantic GlobalFlyer 37 Manaslu 37 GOCE 37 Snowball Earth 37 Frank Borman 37 mountaineer 37 Apollo missions 37 Hadow 37 Condor Resources 37 glaciologists 37 Cairn Energy PLC 37 Faroe Petroleum 37 Scythian 37 barque 37 #nd Fighter Group 37 voyages 36 thylacine 36 Plesetsk Cosmodrome 36 Richthofen 36 Arctic permafrost 36 Carboniferous 36 polar 36 Lunar Module 36 Permafrost