SimilarityRank
ice_age 0.698 82789
Ice_Age 0.665 78392
million_of_year 0.664 47068
dinosaur 0.653 10877
around_[number]_year_ago 0.649 99750
modern_human 0.648 75948
Jurassic 0.640 97947
Neanderthal 0.620 52195
Homo_sapiens 0.616 91445
thousand_of_year_ago 0.611 91960
fossil 0.604 11711
prehistoric 0.599 40720
volcanic_activity 0.583 80643
lava_flow 0.571 93428
the_Bronze_Age 0.569 84065
vertebrate 0.567 40301
life_form 0.565 31360
fauna 0.558 23619
about_[number]_year_ago 0.554 22341
scientist_say 0.549 57227
mammal 0.548 9309
biota 0.546 81008
human_evolution 0.544 82895
herbivore 0.543 55886
life_on_Earth 0.543 67776