SimilarityRank
Ice_Age 0.783 78392
[number]_million_year_ago 0.698 80067
glacial 0.645 77210
ice_sheet 0.644 43576
volcanic_activity 0.628 80643
volcanic_eruption 0.608 55368
sea_level 0.607 24215
climatic_change 0.606 79774
permafrost 0.606 53433
glacier 0.604 9427
prehistoric 0.589 40720
global_warming 0.587 5979
million_of_year 0.585 47068
human_evolution 0.583 82895
warming 0.581 15011
dinosaur 0.579 10877
global_temperature 0.579 87576
Jurassic 0.575 97947
solar_activity 0.574 98984
cataclysm 0.574 67890
ice_core 0.568 98081
prehistory 0.559 81951
Neanderthal 0.557 52195
temperature_change 0.555 60745
lava_flow 0.555 93428