Related by context. Frequent words. (Click for all words.) 63 placental mammals 61 duck billed platypus 60 Indohyus 60 ichthyosaur 60 monotremes 60 echidnas 59 echidna 59 peccary 59 theropod 59 frogs lizards 59 Australopithecus sediba 58 hoofed mammals 58 horned dinosaurs 58 platypuses 58 kipunji 57 chimpanzees gorillas 57 Homo habilis 57 Australopithecus africanus 56 ichthyosaurs 56 hominid species 56 host = document.location.host 56 Mapusaurus 56 mosasaurs 56 pubic lice 56 giant anteater 55 rheas 55 By HARVEY SIMPSON 55 platypus genome 55 carnivorous dinosaurs 55 Darwin finches 55 springtails 55 mitochondrial DNA mtDNA 55 eukaryote 55 thylacine 55 invertebrate animals 55 By Laurie Kulikowski 55 marsupial 55 marsupials 55 feathered dinosaur 54 Torosaurus 54 Irmis 54 Parthenogenesis 54 Coelophysis 54 Ventastega 54 parthenogenetic 54 IntergalaticEarth 54 theropod dinosaurs 54 Italy coul 54 simian immunodeficiency virus 54 metazoan 54 birds mammals reptiles 54 fossilized skull 54 plesiosaurs 54 platypus 54 anteater 54 mammalian species 53 snakes lizards 53 amphibians reptiles 53 Tasmanian tiger 53 wolf spiders 53 frogs turtles 53 Diplodocus 53 genus Homo 53 Darwinius 53 crocodilian 53 Liang Bua 53 carnivorous dinosaur 53 % #F# #v.jsn 53 quadrupedal 53 trilobite 53 Paranthropus 53 reproduce asexually 53 vertebrate animals 53 goannas 53 developmental abnormalities 53 extinct mammals 53 kinkajous 53 Raptorex 53 auklets 52 weta 52 insects spiders 52 Homo floresiensis 52 flatworm 52 Frans de Waal 52 allosaurus 52 Ardipithecus ramidus 52 Ardipithecus 52 marmoset 52 coevolution 52 toothed whales 52 pine martens 52 coprolite 52 imprinted genes 52 homo erectus 52 By LOREN STEFFY 52 aurochs 52 African clawed frog 52 H. sapiens 52 flightless birds 52 Columbian mammoth 52 nematode worm