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Paleontology; Paleozoology (560)

analyse ancestor ancient animal animals atmosphere bacteria beds benton biological biology biostratigraphy birds blackwell brachiopod butterfield california cambrian cell changed chicago china cladistic classifying climate commonly comparative complex content cowen dates dating decay definition developmental devonian dinosaurs diversified diversity dna dominant earliest ecological ecosystems environments estimate estimating eukaryote event evolution evolutionary evolved explain explosion extinct extinction features fish formed fossil fossils genera genetic geochemical geological geology historical humans hypotheses impact implications insects interaction invertebrate journal layer lineage linnean mammals marine mats microbial molecular multicellular museum navigation nitecki observations oceans organism origin palaeontology paleobiology paleontological paleontologist paleontology phylogenetic plants portal presence preserved produced proposed radioactive radiometric rapid rapidly remains represented retrieved rise rock role rudwick science scientist search shells source species taxonomy technique trace vertebrate zoology



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