Related by context. Frequent words. (Click for all words.) 38 Iditarod musher 36 marine ecologist 36 Iditarods 36 Arctic explorer 36 Sebastian Schnuelle 36 Wrangell St 35 subarctic 35 glaciologist 34 forest ecologist 34 lichens 32 Hugh Neff 32 geographer 32 Antarctic Peninsula 32 Seward Peninsula 32 lichen 31 Antarctic peninsula 31 expeditions 31 Kluane 30 Ellesmere Island 30 glacial retreat 30 expedition 30 Weddell Sea 29 huckleberries 29 Doug Mellgren 29 USGS scientist 29 glaciers 29 Antarctica 29 sediment cores 28 Ed Viesturs 28 Burgess Shale 28 Lorene 28 Antarctic 28 retreating glaciers 27 USGS geophysicist 27 Bella Vista Ark. 27 glacier 26 Pleistocene era 26 permafrost 26 sequoias 26 Galapagos islands 25 backcountry ski 25 aspen trees 25 aspens 25 conquered Everest 25 glacial ice 25 mountain glaciers 25 Lonnie 25 polar regions 25 Punta Arenas Chile 25 Sawtooth Mountains 25 Arctic Ocean 24 Puncak Jaya 24 seamount 24 lake sediments 24 giant sequoias 23 Mount Katahdin 23 volcanoes 23 volcanically active 23 icecaps 23 snowcapped peaks 23 NASA MODIS Image 23 mountain ranges 23 glaciers melt 23 Flagstaff Ariz. 23 National Geographic Adventure 23 melting glacier 22 fabled Northwest Passage 22 polar ice 22 Seaside Ore. 22 shrinking glaciers 22 Arctic Circle 22 Glaciers 22 journal Geology 22 icecap 22 Nome Alaska 21 Antarctic Ice 21 glaciers melting 21 Precambrian 21 melting ice 21 Antarctic ice 21 glaciologists 20 Steamboat Springs Colo. 20 Quaternary 20 glacier melt 20 Revelstoke BC 19 paleoclimate 19 Mount Kilimanjaro 18 continental drift 18 dinosaurs roamed 18 summiting 18 dinosaur bones 17 Cradle Mountain 17 Ilulissat 17 caldera 16 Mt Kilimanjaro 16 Rocky Mountains 14 Banff Alta 13 melting 13 Moab Utah 13 Yukon Territory 13 snowline