29 results found
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Cretaceous dinosaur bone contains recent organic material and provides an environment conducive to microbial communities

    Evan T Saitta et al.
    Subterranean fossil bone hosts a living microbiome different from the surrounding sediment without evidence of original protein preservation.
    1. Evolutionary Biology

    A non-archaeopterygid avialan theropod from the Late Jurassic of southern Germany

    Oliver WM Rauhut et al.
    A new taxon from the Late Jurassic of southern Germany represents the second volant bird known from that time period and documents the improvement of flapping flight in bird evolution.
    1. Developmental Biology
    2. Genetics and Genomics

    Molecular shifts in limb identity underlie development of feathered feet in two domestic avian species

    Eric T Domyan et al.
    Feathered feet of pigeons and chickens result from a partial molecular and morphological transformation of legs to a wing-like identity.
    1. Ecology
    2. Evolutionary Biology

    Extreme adaptations for aquatic ectoparasitism in a Jurassic fly larva

    Jun Chen et al.
    Well-preserved fossils reveal an extreme morphological specialization of fly larvae, and broaden our understanding of the diversity of ectoparasitism in Mesozoic insects.
    1. Ecology
    2. Evolutionary Biology

    Brood care in a 100-million-year-old scale insect

    Bo Wang et al.
    The discovery of the earliest direct evidence of brood care in insects demonstrates a remarkably conserved egg-brooding reproductive strategy within scale insects in stasis for nearly 100 million years.
    1. Cell Biology
    2. Physics of Living Systems

    Graded titin cleavage progressively reduces tension and uncovers the source of A-band stability in contracting muscle

    Yong Li et al.
    Elastic forces generated by the giant protein titin define both passive and active tension of skeletal muscle fibers and protect the sarcomeric myosin filaments from severe disruption during contraction.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    H3K9me3 is required for inheritance of small RNAs that target a unique subset of newly evolved genes

    Itamar Lev et al.
    In Caenorhabditis elegans histone methylation (H3K9me3) controls the synthesis of heritable small RNAs in a gene-specific manner and thus enables 'flagging' of newly-acquired genes.
    1. Ecology

    Oxygen isotopes suggest elevated thermometabolism within multiple Permo-Triassic therapsid clades

    Kévin Rey et al.
    Two therapsid clades, dicynodonts and cynodonts, independently acquired and developed an endotherm-like thermoregulation during the Late Permian period, that probably helped them to survive the major global climate and environmental fluctuations of the end-Permian.
    1. Ecology

    The lost world of Cuatro Ciénegas Basin, a relictual bacterial niche in a desert oasis

    Valeria Souza et al.
    At Cuatro Ciénegas, the ancestral niche conditions of the ancient shores of Laurentia persisted along with its microbial communities that have been coevolving for a very long time.

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