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1 snow, ice, rock 2 tundra, river meander 3 June, 75 degrees N 4 July, 75 degrees N 5 vegetation 6 perennial grasses 7 low perennials 8 very small, very old 9 underground shrubs 10 underground shrub 11 heat-trapping butterflies 12 many-year-old caterpillar 13 black spruce monoculture 14 some broadleaf trees 15 cylindrical crown 16 low sun 17 midnight sun 18 arctic lemming 19 short-tailed weasel 20 weasel teeth 21 weasel molars 22 arctic fox 23 wolves 24 wolf carnasials 25 snowy owl 26 skuas 27 skua fertilizer

28 insectivores 29 insectivore chicks 30 bird food 31 sandpipers 32 Eider ducks 33 Eiderduck creche 34 champion migrator 35 sea birds 36 seals 37 musk ox 38 gregarious musk oxen 39 slow decomposition 40 caribou/reindeer 41 antlers? 42 ptarmigan 43 ptarmigan in winter 44 ptarmigan caecum 45 ptarmigan caecum 46 ptarmigan gizzard stones 47 ptarmigan crop 48 ptarmigan lunch 49 bears 50 bear litters 51 salmon runs 52 coal 53 mastodont 54 mammoth

55 Iclandic countryside 56 Iclandic countryside 57 Iclandic countryside 58 Volcan Orizaba, Mexico 59 Volcan Popcatapetl, Mexico 60 Chilean andes 61 tussock plants 62 tussock plants 63 guanacos 64 guanaco teeth 65 spring in a cold world 66 snow melt edge 67 snow melt edge 68 even under the snow 69 a wool skirt 70 glaciers on mountains 71 barren glaciated now 72 barren glaciated now 73 oak, 2400 m Costa Rica 74 4,500 m, Venezuela 75 a dandelion forest 76 a dandelion woolly tree 77 even woolly leaves 78 photosynthesize? 79 solufluction 80 solufluction