Related by context. Frequent words. (Click for all words.) 55 Lonnie Dupre 54 Pen Hadow 54 Arctic explorer 53 Spitzbergen 52 antarctic 52 polar explorer 51 polar expeditions 51 polar explorers 51 Antarctica 50 David Hempleman Adams 50 penetrating radar 50 Sir Ranulph Fiennes 50 Hercules Inlet 49 Douglas Mawson 49 Antartic 49 Catlin Arctic 49 Antarctic explorer 49 NASA Mars rover 48 Antarctic explorers 48 admiral asks 48 intrepid explorers 48 interplanetary spacecraft 48 Antarctic 48 Norwegian explorer Roald 48 Antarctic expedition 47 polar 47 adventurers 47 Sir Ernest Shackleton 47 explorers 47 Les Stroud 47 frozen wasteland 47 AP Interview CG 46 Hadow 46 Arctic Circle 46 Arctic 46 NASA Cassini 46 fabled Northwest Passage 46 icefield 46 ill fated expedition 46 Antartica 46 expedition 46 undersea explorer 45 robotic explorers 45 icecap 45 Franz Josef Land 45 Sir Ranulph 45 cryosphere 45 robotic rovers 45 Mendenhall Glacier Visitor 45 Cryosat 45 expeditions 45 arctic 45 Frank Borman 45 Breashears 44 Svalbard archipelago 44 celestial navigation 44 Polar Regions 44 Martian arctic 44 NASA Spacecraft 44 permafrost thaws 44 NASA rovers 44 Winter wonderland 44 Melting glaciers 44 adventurer 44 snowshoe hike 44 Ernest Shackleton 44 icecaps 44 Roald Amundsen 44 Weddell Sea 44 Balloonists 44 EDN III 43 climbing Kilimanjaro 43 Lunar eclipse 43 Coral reef 43 Vinson Massif 43 spaceborne 43 conquered Everest 43 planet 43 laser altimeter 43 melting icecaps 43 stargazer 43 intrepid explorer 43 shrinking polar 43 polar expedition 43 Expedition 43 Turnagain Pass 43 Ice Melt 43 glaciology 43 By EDDIE OSIFELO 43 Piers Sellers 43 TRAVEL Trek Tracker 43 Discovery undocked 43 inhospitable environments 43 Red Planet 43 Fred Haise 43 Ross Ice Shelf 43 disappearing glaciers 43 Mt Taranaki 43 SUMMIT ON 43 Antarctic glacier 43 Gusev crater