Related by context. Frequent words. (Click for all words.) 70 Seed Vault 68 Svalbard Global 51 Svalbard 46 Kola Peninsula 43 icebound 42 permafrost 42 Spitsbergen 42 Arctic Circle 41 Arctic archipelago 41 methane hydrate 41 Longyearbyen 40 peat bog 39 greenhouse 39 Noah Ark 39 Permafrost 39 Arctic tundra 38 biosphere 38 methane hydrates 38 lava tube 38 arctic 38 Arctic seabed 38 Antarctic 38 Chilingarov 38 icehouse 38 igloo 38 root cellar 38 underground caverns 38 peat bogs 38 subarctic 38 North Pole 38 Sakhalin Island 37 underground cavern 37 herbarium 37 geological formations 37 Norway 37 tundra 37 Aleutian chain 37 Lake Baikal 37 lunar soil 37 Umatilla Chemical Depot 37 taiga 37 Barents Sea 37 terrarium 36 underground bunker 36 Norwegian Polar 36 airtight containers 36 sarcophagus 36 Baltic Sea 36 Weddell Sea 36 Antarctic expedition 36 smallpox virus 35 Iceland 35 Roald Amundsen 35 melting permafrost 35 peatlands 35 radioactive fuel rods 35 floe 35 winterized tents 35 Antarctica 35 Qinghai Tibet Plateau 35 underground lair 35 mini nukes 35 Sleipner 35 Antarctic ozone 35 SINTEF 35 underground bunkers 35 Volcanic eruptions 35 Burgess Shale 34 -# degrees Celsius [002] 34 admiral asks 34 plutonium reprocessing plant 34 seabeds 34 Ice Age 34 igloos 34 Arctic 34 Ellesmere Island 34 dinosaur eggs 34 icecap 34 musk oxen 34 gas hydrates 34 spaceship 34 seabed 34 Arctic Ocean 34 kerogen 34 -# degrees Fahrenheit [001] 34 Alaska Aleutian Islands 34 retreating glaciers 34 icecaps 34 Icelandic 34 boreal forests 34 freezer 34 Abominable Snowman 34 Chignik Bay 34 African savannah 33 fjord 33 Lofoten 33 Pleistocene era 33 cavern 33 Icelanders 33 Seward Peninsula 33 marine reptiles