Results 61 to 70 of about 30,236 (185)
Climatic change in northeastern Brazil: paleoparasitological data
Memorias do Instituto Oswaldo Cruz, 1993 Trichuris eggs were observed in Kerodon rupestris coprolites dated 9,000 years before present, collected in archeological sites of São Raimundo Nonato, northeastern Brazil.
Adauto Araujo +2 more
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Concept for a research project in early crustal genesis [PDF]
Planetary volatiles, physical and chemical planetary evolution, surface processes, planetary formation, metallogenesis, crustal features and their development, tectonics, and paleobiology are ...
Ashwal, L., Phillips, R. J.
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Making the most of clade selection [PDF]
, 2017 Clade selection is unpopular with philosophers who otherwise accept multilevel selection theory. Clades cannot reproduce, and reproduction is widely thought necessary for evolution by natural selection, especially of complex adaptations.
Doolittle, W. Ford
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Climate and cultural evolution drove Holocene cropland change in the Huai River Valley, China
iScienceSummary: As an important way of maximizing land productivity by growing more than one crop type in the same field, mixed cropping has been an effective option for sustaining population growth under different climatic conditions since prehistoric period ...
Yanyan Yu +10 more
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The extinct, giant giraffid Sivatherium giganteum: skeletal reconstruction and body mass estimation [PDF]
, 2016 Sivatherium giganteum is an extinct giraffid from the Plio–Pleistocene boundary of the Himalayan foothills. To date, there has been no rigorous skeletal reconstruction of this unusual mammal.
Christopher Basu +8 more
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New evidence for the earliest ornithischian dinosaurs from Asia
iScienceSummary: The Early Jurassic ornithischian dinosaurs in Laurasia are dominated by armored dinosaurs, with other early ornithischian groups being rare. Here, a new taxon, Archaeocursor asiaticus gen. et sp.
Xi Yao +4 more
doaj +1 more source
The development of the Silurian trilobite Aulacopleura koninckii reconstructed by applying inferred growth and segmentation dynamics: A case study in paleo-evo-devo [PDF]
, 2017 Fossilized growth series provide rare glimpses into the development of ancient organisms, illustrating descriptively how size and shape changed through ontogeny.
Fusco, Giuseppe +3 more
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Decline in extinction rates and scale invariance in the fossil record
, 1998 We show that the decline in the extinction rate during the Phanerozoic can be accurately parameterized by a logarithmic fit to the cumulative total extinction. This implies that extinction intensity is falling off approximately as the reciprocal of time.
Eble, Gunther J., Newman, M. E. J.
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The last common bilaterian ancestor [PDF]
, 2002 Many regulatory genes appear to be utilized in at least superficially similar ways in the development of particular body parts in Drosophila and in chordates.
Davidson, Eric H., Erwin, Douglas H.
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Editorial: Permian Extinctions
Frontiers in Earth Science, 2021 Robert A. Gastaldo +4 more
doaj +1 more source