Related by context. Frequent words. (Click for all words.) 50 eons 49 Archaean 48 sedimentary rock 46 stromatolites 44 Posted -# sec 44 tropical jungles 44 dinosaurs roamed 44 lava tubes 43 volcanic crater 43 Spanish conquerors 43 trilobites 43 % #F# 3v.jsn 43 geologic 43 Pleistocene era 42 limestone cave 42 grassy plains 42 Late Cretaceous 42 meteor impacts 42 ichthyosaur 42 radiocarbon dated 42 Jurassic Period 42 Ferry sinks 41 Gondwanaland 41 lavas 41 Early Cretaceous 41 continental drift 41 Incas 41 Fossilized 41 saber toothed tigers 41 Santa Rosalia 41 marine reptiles 41 Chicxulub crater 41 plate tectonics 41 Inca Empire 41 millenniums 41 continental crust 41 lava rocks 41 lithosphere 40 barrens 40 undersea volcanoes 40 Olmecs 40 Zinc Lead 40 lush jungles 40 marine sediments 40 plesiosaurs 40 Charred bodies 40 Arctic permafrost 40 sliced silicon wafers 40 twin Viking landers 39 dinosaur species 39 Late Triassic 39 fossilize 39 www.thestar.com online 39 glaciations 39 pilot Edwin Lasso 39 zircons 39 lake sediments 39 fossilized 39 ALH# 39 naturally occurring mineral 39 Ice Ages 39 hunter gatherers 39 glaciation 39 hominid species 39 millennia 38 Editors David Kravets 38 unicellular 38 Mesozoic Era 38 horned dinosaurs 38 Spanish colonizers 38 horned dinosaur 38 methanogens 38 dinosaurs 38 supercontinent 38 Cretaceous Period 38 Burgess Shale 38 tech freelancer 38 explorer Hernando 38 Sierra Madres 38 chondrules 38 millenia 38 Chris Galea di 38 single celled 38 Boat sinks 38 biggest Footsie fallers 38 magmas 37 Tenochtitlan 37 megafauna 37 meteorite impacts 37 volcanic vents 37 misty mountains 37 Earthlike 37 Affirmed swept 37 larvae hatch 37 hummocks 37 pre Incan 37 primordial ooze 37 bleached bones 37 By Charlene Laino 37 Service oriented architectures 37 rugged cliffs