Related by context. Frequent words. (Click for all words.) 55 coprolites 54 melanosomes 54 Ardipithecus 54 tyrannosaur 53 fossilized 53 hadrosaur 52 fossilized bones 52 Wolbachia 52 fossils 52 metabolically active 52 marine invertebrates 51 Tiktaalik 51 hominins 51 Indohyus 51 asexual reproduction 51 theropod 51 mitochondrial genome 51 diatom 51 soft tissues 50 fossilization 50 vaginal secretions 50 collagen fibers 50 vertebrate 50 feathered dinosaurs 50 imprinted genes 50 fossil 50 Caenorhabditis elegans 49 fatty tissue 49 diatoms 49 otoliths 49 germ cells 49 Archaeopteryx 49 oxygen isotopes 49 neural tissue 49 osteocalcin 49 zircons 49 fossilized remains 49 unfertilized eggs 48 muscle tissue 48 cortical bone 48 hominin 48 LB1 48 osteoblasts 48 RNA molecule 48 HHMI investigator 48 forelimb 48 lysozyme 48 paleontologists 48 ribozyme 48 afarensis 48 centrosomes 48 tetrapod 48 T. rex 48 PrP 48 microfossils 48 stratum corneum 48 journal Biology Letters 47 trackways 47 spermatozoa 47 mammalian species 47 Mitochondrial DNA 47 Ardipithecus ramidus 47 carnivorous dinosaurs 47 synovial fluid 47 Longrich 47 genomic sequence 47 theropods 47 pterosaur 47 nanosized 47 sauropod 46 single celled 46 protein fragment 46 paleoanthropologist 46 outer layer 46 dinosaur fossil 46 cultured cells 46 Paleoanthropology 46 glycan 46 microbiota 46 crocodilians 46 Columbian mammoth 46 uterine lining 46 palaeontologist 46 sedimentary rock 46 H. erectus 46 bones 46 Radiocarbon dating 46 PLoS One 46 foraminifera 46 dinosaur fossils 46 PNAS paper 46 Biology Letters 46 oocyte 46 palaeontologists 46 morphology 46 cloned embryo 46 epididymis 46 marine reptile 46 subcutaneous fat 46 Palaeontology 45 Neandertal