Results 41 to 50 of about 3,958,760 (345)
Extinction of herbivorous dinosaurs linked to Early Jurassic global warming event
Proceedings of the Royal Society B, 2020 Sauropods, the giant long-necked dinosaurs, became the dominant group of large herbivores in terrestrial ecosystems after multiple related lineages became extinct towards the end of the Early Jurassic (190–174 Ma).
D. Pol +7 more
semanticscholar +1 more source
Mutilation of the tree of life via mass extinction of animal genera
Proceedings of the National Academy of Sciences of the United States of America, 2023 Significance We are in the sixth mass extinction event. Unlike the previous five, this one is caused by the overgrowth of a single species, Homo sapiens. Although the episode is often viewed as an unusually fast (in evolutionary time) loss of species, it
Gerardo Ceballos, Paul R. Ehrlich
semanticscholar +1 more source
Paleobiology, 2019 . Reduction of body size is a common response of organisms to environmental stress. Studying the early Toarcian succession in the Lusitanian Basin of Portugal, we tested whether the shell size of benthic marine communities of bivalves and brachiopods ...
V. Piazza +3 more
semanticscholar +1 more source
Mass Extinction Coincided With Expanded Continental Margin Euxinia During the Cambrian Age 4
Geophysical Research Letters, 2023 Earth's biosphere witnessed the first major extinction event in the Phanerozoic during the Cambrian Age 4, with a genera loss up to ∼45%. The traditional view suggested that marine anoxia was the main cause of the biotic crisis, yet recent geochemical ...
Chao Chang +4 more
doaj +1 more source
Science, 2023 The Cretaceous-Paleogene event was the last mass extinction event, yet its impact and long-term effects on species-level marine vertebrate diversity remain largely uncharacterized.
G. Guinot, F. Condamine
semanticscholar +1 more source
Global late Quaternary megafauna extinctions linked to humans, not climate change [PDF]
, 2014 The late Quaternary megafauna extinction was a severe global-scale event. Two factors, climate change and modern humans, have received broad support as the primary drivers, but their absolute and relative importance remains controversial.
Boslough M +11 more
core +2 more sources
Maximal Sensitive Dependence and the Optimal Path to Epidemic Extinction [PDF]
, 2010 Extinction of an epidemic or a species is a rare event that occurs due to a large, rare stochastic fluctuation. Although the extinction process is dynamically unstable, it follows an optimal path that maximizes the probability of extinction. We show that
Bianco, Simone +3 more
core +4 more sources
Ordovician–Silurian true polar wander as a mechanism for severe glaciation and mass extinction
Nature Communications, 2022 Palaeomagnetic data from South China and compiled reliable palaeopoles from 4 other continents reveals a ~50˚ true polar wander (TPW) event occurring 450–440 million years ago.
Xianqing Jing +5 more
doaj +1 more source
High precision microlensing maps of the Galactic bulge [PDF]
, 2008 We present detailed maps of the microlensing optical depth and event density over an area of 195 sq. deg towards the Galactic bulge. The maps are computed from synthetic stellar catalogues generated from the Besancon Galaxy Model, which comprises four ...
A. C. Robin +34 more
core +3 more sources
Gamma-ray spectrometry across the Upper Devonian basin succession at Kowala in the Holy Cross Mountains (Poland) [PDF]
, 2003 The Upper Devonian sequence at Kowala in the Holy Cross Mountains was logged using gamma-ray spectrometry, for investigating the changes of oxygenation level in the Late Devonian basin.
Bond, D.P.G., Zaton, M.
core +2 more sources