Related by context. Frequent words. (Click for all words.) 57 placental mammals 56 Apatosaurus 55 trilobite 55 tyrannosaur 55 otolith 55 braincase 55 baleen whale 54 mosasaur 54 horned dinosaurs 54 Tiktaalik 53 Megalodon 53 Diplodocus 53 theropod 53 T.rex 52 Raptorex 52 plesiosaurs 52 hominid species 52 hadrosaur 52 stickleback 52 Indohyus 52 tyrannosaurus rex 52 coprolites 52 apelike 52 medullary bone 51 Australopithecus 51 Columbian mammoth 51 marine reptile 51 otoliths 51 plesiosaur 51 fossil specimens 51 feathered dinosaurs 51 wooly mammoth 51 mottled brown 51 horned dinosaur 51 4 chars 50 radiocarbon dated 50 LB1 50 tyrannosaurus 50 H. sapiens 50 Ardipithecus 50 Archaeopteryx 50 Stegosaurus 50 tetrapod 50 ALH# 49 Tyrannosaurus 49 baleen whales 49 snail shells 49 karyotype 49 convergent evolution 49 flatworms 49 hominid fossils 49 bony plates 49 diatom 49 theropods 49 Ardipithecus ramidus 49 tyrannosaurs 49 marine invertebrates 48 theropod dinosaurs 48 ppm molybdenum 48 cartilaginous 48 unicellular 48 weighing #g 48 zircons 48 vertebrate 48 Homo habilis 48 gastropods 48 2c x 48 evolutionary origins 48 spherules 48 pterosaur 48 macroevolution 48 scalloped edges 48 prokaryotes 48 photosynthetic organisms 47 Late Cretaceous 47 Allosaurus 47 1c x 47 microfossils 47 fleshier 47 crocodilian 47 diatoms 47 mammalian brain 47 H. erectus 47 melanosomes 47 fossilized bones 47 stegosaurus 47 toothed whales 47 radiocarbon dates 47 #x#x# [005] 47 tetrapods 47 sexual dimorphism 47 carnivorous dinosaurs 47 Neandertal 47 giant squids 47 T rex 47 triceratops 47 Sperm whales 46 Xenopus 46 ammonites 46 oxygen isotopes 46 carnivorous dinosaur