Related by context. Frequent words. (Click for all words.) 53 polar ice 53 Siberian permafrost 52 Greenland glacier 51 polar icecaps 51 lunar soil 51 volcanic lava 51 Arctic permafrost 50 melting ice 50 Antarctic glacier 50 permafrost thaws 50 Alpine glaciers 50 glacial ice 49 Melting ice 49 Alaskan tundra 49 -# degrees Fahrenheit [002] 49 Siberian tundra 49 melting 49 arctic 48 hardened lava 48 icy crust 48 polar craters 48 icecaps 48 Lake Vostok 48 magma ocean 48 Melting glaciers 47 Antarctic ice 47 ice melts 47 permafrost 47 absorbs carbon dioxide 46 equatorial waters 46 Antarctic glaciers 46 ice 46 subarctic 46 Seafloor 46 Highly radioactive 46 encrusting 46 glaciers melt 46 arctic tundra 46 freezer compartment 46 Greenland ice 45 Neutron stars 45 glasslike 45 poleward 45 undersea volcanoes 45 Carefully pour 45 basalt rock 45 subglacial 45 deg F 45 salt crystals 45 tundra 45 lava flowing 44 receding glaciers 44 polar caps 44 marine sediments 44 sedimentary layers 44 abyssal 44 Rinse thoroughly 44 lava tubes 44 thawing permafrost 44 moon Enceladus 44 upwellings 44 melting permafrost 44 lavas 44 icefield 44 clathrates 44 lunar craters 44 molten rocks 44 Greenland glaciers 44 seawater 44 icecap 44 permanently shadowed craters 43 dishpan 43 Spread evenly 43 aerates 43 volcanic vents 43 Carefully remove 43 moondust 43 argon gas 43 melting polar 43 seabeds 43 retreating glaciers 43 refrigerate overnight 43 streambeds 43 moistens 43 Jupiter moon Io 43 Arctic Ocean 43 melt 43 airtight seal 43 aragonite 43 grayish white 43 methane CH4 43 polar vortex 43 cumulonimbus 43 Nares Strait 43 Permafrost 43 mammoth tusks 43 Unroll 43 encrustation 42 pourable 42 superhot 42 Ice Shelf