Related by context. Frequent words. (Click for all words.) 63 tundra 54 arctic 53 musk oxen 53 boreal forests 52 permafrost 52 boreal 51 northern latitudes 51 frozen tundra 51 boreal forest 50 melting permafrost 49 Arctic Circle 49 Arctic 49 glacier 48 woolly mammoths 48 steppe 48 mountain pine beetles 47 mammoths 47 peat bogs 47 caribou 46 Siberia 46 plains 46 Rocky Mountains 46 lichens 46 Himalayas 46 prairies 46 warmer winters 46 glaciers 46 Arctic Ocean 46 Late Cretaceous 46 dense forests 45 lichen 45 ungulates 45 musk ox 45 polar regions 45 Ellesmere Island 45 steppes 45 temperate regions 44 Antarctic 44 polar 44 mountain ranges 44 lowlands 44 Pleistocene 44 denning 44 Gobi Desert 44 Antarctica 44 Tibetan Plateau 44 Baffin Island 44 ice melts 43 pine forests 43 snowpacks 43 lodgepole pines 43 grasslands 43 glacial melt 43 Arabian desert 43 latitudes 43 meltwater 43 Sahara Desert 43 polar ice 43 tropics 43 Himalayan foothills 43 Gobi desert 43 Polar bears 43 snowfields 43 megafauna 42 Prairies 42 Melting ice 42 alps 42 pikas 42 snowy mountains 42 polar bears 42 Migratory birds 42 marmots 42 aspens 42 aspen 42 glacial 42 treeline 42 Kola Peninsula 41 Artic 41 warmer temperatures 41 polar caps 41 Resolute Bay 41 landmasses 41 martian 41 black footed ferret 41 Alaskan wilderness 41 minus #C 41 narwhal 41 deserts 41 sasquatch 41 walruses 41 wintering grounds 41 emperor penguins 41 lodgepole pine 41 glacial ice 41 lynx 41 arid desert 41 Sierra Nevadas 41 Warmer temperatures 41 North Pole 40 marmot 40 highlands