Related by context. Frequent words. (Click for all words.) 62 Antarctic expedition 58 expeditions 57 polar expedition 56 expedition 55 Arctic explorer 55 Antarctic 53 Antarctica 48 polar explorer 48 Weddell Sea 48 Ernest Shackleton 48 Roald Amundsen 47 IPY 47 Antartica 47 HMS Beagle 47 explorers 47 Robert Peary 46 voyages 45 Everest expedition 45 Expedition 45 Sir Ernest Shackleton 44 hydrographic 43 ICESat 43 spaceflights 43 polar 43 Heyerdahl 43 Chilingarov 43 explorations 43 Antarctic Peninsula 43 explorer 42 glaciers 42 Arctic 42 Sir Ranulph Fiennes 42 Antarctic Treaty 42 McMurdo Sound 42 astronomical observations 42 Royal Geographical Society 41 whaling vessel 41 British Antarctic Survey 41 voyage 41 Ross Ice Shelf 41 hunting expeditions 41 voyaging 41 Greenland 41 Arctic Ocean 41 circumnavigation 41 interglacial period 41 Coast Guard icebreaker 40 Mars Pathfinder 40 Spitsbergen 40 glaciologists 40 Baffin Island 40 oceanographic 40 Inuit hunters 40 planetary missions 40 Nansen 40 gas hydrates 40 palaeontology 40 Polar Regions 40 underwater archeology 40 Climate Impact Assessment 40 alpinists 40 Vostok 39 Krikalev 39 Hadow 39 Hinode 39 exploration 39 planetary exploration 39 Amundsen 39 Piers Sellers 39 marine reptiles 39 solo circumnavigation 39 Cassini Huygens 39 archaeological finds 39 Around Alone 39 lunar missions 39 Northwest Passage 38 Everest Expedition 38 archaeological digs 38 Norwegian Polar 38 glacier 38 Expeditions 38 icecap 38 retreating glaciers 38 orbiting Mars 38 adventurer 38 Northeast Passage 38 geological 38 thylacine 38 Antarctic ice 38 adventurers 38 summitted 38 Adventurer 38 glaciologist 37 undersea 37 whalers 37 methane hydrate 37 Boer War 37 polar ice 37 dogsled 37 oceanographers 37 Antarctic waters