Results 81 to 90 of about 31,099 (302)

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.
core  

Limb-Bone Scaling Indicates Diverse Stance and Gait in Quadrupedal Ornithischian Dinosaurs [PDF]

, 2012
Background The most primitive ornithischian dinosaurs were small bipeds, but quadrupedality evolved three times independently in the clade. The transition to quadrupedality from bipedal ancestors is rare in the history of terrestrial vertebrate ...
Barrett, PM, Linton, DH, Maidment, SCR, Upchurch, P   +3 more
core   +1 more source

Human evolution: taxonomy and paleobiology [PDF]

Journal of Anatomy, 2000
This review begins by setting out the context and the scope of human evolution. Several classes of evidence, morphological, molecular, and genetic, support a particularly close relationship between modern humans and the species within the genus Pan, the chimpanzee.
Bernard Wood, Brian G. Richmond
openaire   +3 more sources

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, Adriana Rangel, Luiz Fernando Rocha Ferreira   +2 more
doaj   +1 more source

Early Cretaceous–Late Miocene Basin–Mountains Pattern in the Northeastern Margin of the Tibetan Plateau, NW China: Evidence From Detrital Zircon Chronology in the Lanzhou Basin

Geological Journal, EarlyView.
Using DZmix and DZstats models, we quantified the contributions of potential sources of the Lanzhou basin. Our findings indicate that the Cenozoic cooling and denudation signals primarily originated from Qilian and West Qinling, which were the main sediment sources.
Hang Liu, Hu–jun Gong, Fen–hong Luo, Rui Zhang   +3 more
wiley   +1 more source

Forelimb muscle and joint actions in Archosauria: insights from Crocodylus johnstoni (Pseudosuchia) and Mussaurus patagonicus (Sauropodomorpha) [PDF]

, 2017
Many of the major locomotor transitions during the evolution of Archosauria, the lineage including crocodiles and birds as well as extinct Dinosauria, were shifts from quadrupedalism to bipedalism (and vice versa).
Allen, V, Hutchinson, J R, Otero, A, Pol, D   +3 more
core   +5 more sources

Comparison of diverse mandibular mechanics during biting in Devonian lungfishes

iScience
Summary: Fossil lungfish from the Late Devonian Gogo Formation, Australia, feature some of the most remarkable and specialized mandible morphologies in their 415-million-year history.
Joshua Bland, Hugo Dutel, John A. Long, Matteo Fabbri, Joseph Bevitt, Kate Trinajstic, Olga Panagiotopoulou, Alice M. Clement   +7 more
doaj   +1 more source

Smart Solutions for Sustainable Access and Technological Equity: The Effect of Energy Transition, Artificial Intelligence, and Digital Economy on Energy Poverty

Geological Journal, EarlyView.
ABSTRACT The integration of energy transition, artificial intelligence, and the digital economy represents a significant shift in the global effort to combat energy poverty and offers innovative tools and approaches to increase energy access, efficiency, and affordability for underserved populations. This study examines the impact of energy transition,
Abdulmuttalip Pilatin, Magdalena Radulescu, Hind Alofaysan, Abdulkadir Barut, Rena Huseynova   +4 more
wiley   +1 more source

Neoarchean Arc Magmatism and Crust Recycling in the Northern Marginal Zone of the Limpopo Complex, Zimbabwe: New Insights From Zircon U‐Pb‐Hf Isotopes of a Charnockite Suite

Geological Journal, EarlyView.
Charnockites with 2691–2607 Ma magmatic ages from the NMZ show arc‐magmatic geochemical signatures. They correspond to the lower‐crustal equivalent of the Chilimanzi Suite Granite in the Zimbabwe Craton. Lu‐Hf isotopic data of magmatic zircons show negative εHf(t) values (−11.18 to −2.20) with TDMC ages of 3699–3158 Ma, suggesting their protolith ...
Toshiaki Tsunogae, Md. Sazzadur Rahman, Gao Pin, M. Santosh, Wataru Fujisaki, Sam Uthup, Prince Mandingaisa   +6 more
wiley   +1 more source

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.
core   +2 more sources