Several subsequent analyses using more recent methods have also recovered estimates from within the Permian, 289 and 265 Mya [36–39]. However, other molecular dating analyses provide dates in the Late or Middle Triassic with one as recent/shallow as 226 Mya [39–43]. This range of estimates...
the earth’s two supercontinents―Laurasia in the north and Gondwanaland in the south―were in the process of pulling apart, cutting dinosaur populations off from each other and interrupting migratory patterns. The fossilized bones, found by paleontologist Doug Wolfe of the Mesa Southwest Museum in...
The AAV genomic coding region is flanked by inverted terminal repeat sequences (ITRs) that serve as the viral origins of replication and provide cis-acting elements required for packaging of progeny genomes19,20. Primate AAV serotypes were shown to establish a latent infection by integrating ...
unusual, but coevolutionary and behaviorally critical specimens in which an organism(s) is preserved while actually doing something”, sensu Boucot9) are known from it10. Cretaceous amber could provide interesting evidence of trophic behaviours in forests during the Mesozoic. However...
The rise of eukaryotic macroalgae in the late Mesoproterozoic to early Neoproterozoic was a critical development in Earth’s history that triggered dramatic changes in biogeochemical cycles and benthic habitats, ultimately resulting in ecosystems habitab
Several subsequent analyses using more recent methods have also recovered estimates from within the Permian, 289 and 265 Mya [36–39]. However, other molecular dating analyses provide dates in the Late or Middle Triassic with one as recent/shallow as 226 Mya [39–43]. This range of estimates...
the earth’s two supercontinents―Laurasia in the north and Gondwanaland in the south―were in the process of pulling apart, cutting dinosaur populations off from each other and interrupting migratory patterns. The fossilized bones, found by paleontologist Doug Wolfe of the Mesa Southwest Museum in...
根据关键词“a new type of ceratopsian dinosaur”首先找到第三段,其最后一句提到:“新发现将改变关于何时这种龙迁入美洲的理论”,继续看下去,终于找到关键句:第五段的第二句“This could mean that ceratopsians originated in North America and migrated to Asia rather than the reverse”(这可能意味着 cera...
While pelagornithid or ‘bony-toothed’ bird fossils representing multiple species are known from Antarctica, a new dentary fragment of a pelagornithid bird from the middle Eocene Submeseta Formation on Seymour Island, Antarctica represents a species wit
35. The proportion of each phase is controlled by the environmental conditions prevailing, with the formation of Ni-sulfide precipitation enhanced by sulphidic conditions and the incorporation within the organic fraction enhanced in non-sulphidic, anoxic conditions35. Raman spectra do not evidence ...