Results 21 to 30 of about 23,892 (256)
A new fossil Lucanidae subfamily (Coleoptera) from the Mesozoic of China [PDF]
Кавказский энтомологический бюллетень, 2015 Litholamprima longimana Nikolajev et Ren, gen. et sp. n. of the family Lucanidae is described from the Lower Cretaceous Yixian Formation. Fossils were collected from Chaomidian Village, Liaoning Province, China.
G.V. Nikolajev, D. Ren
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Nature, 1967 Vertebrate Paleontology By Alfred Sherwood Romer. Third edition. Pp. viii + 468. (Chicago and London: University of Chicago Press, 1966.) $10; 72s.
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Lamarck et Cuvier en révolution
Arts et Savoirs, 2020 In the context of the French Revolution, Lamarck fights Cuvier about the existence, upon the Earth of the past, of sudden catastrophes, which could be responsible of the extinction of the fossil species and prevent their transformations into the actual ...
Cédric Grimoult
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Mètode Science Studies Journal: Annual ReviewStories captivate us by speaking to our imagination and by giving order and meaning to our world. Stories not only give us knowledge about society, but they can also shape our understanding of nature.
Daniel Gamito-Marques
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Diversity, 2022 Elasmobranchii are relatively well-studied. However, numerous phylogenetic uncertainties about their relationships remain. Here, we revisit the phylogenetic evidence based on a detailed morphological re-evaluation of all the major extant batomorph clades
Eduardo Villalobos-Segura +6 more
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BiologyUnderstanding how life-history strategies influence cancer susceptibility in dinosaurs requires a molecular-level analysis of preserved soft tissues. While previous research has largely focused on skeletal remains, the discovery of soft tissue structures
Pramodh Chitral Chandrasinghe +4 more
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Karl Popper and the Mechanisms of Hydrogen Embrittlement
Advanced Engineering Materials, EarlyView.Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
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Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys
Advanced Engineering Materials, EarlyView.Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak +3 more
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Saiga fossils in the Southern-Lower Volga of Astrakhan, Russia [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2014 Conservation of declining migratory species is a challenging task, as the factors that may have determined their past distribution may not determine their extant and future distribution.
Golovachev Mikhail Vladimirovich +3 more
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