INFORMATION:
* Changes to oceanic circulation patterns then resulted in a decrease in atmospheric CO2 levels.
Decline of dinosaurs underway long before asteroid fell
2021-06-29
(Press-News.org) Ten million years before the well-known asteroid impact that marked the end of the Mesozoic Era, dinosaurs were already in decline. That is the conclusion of the Franco-Anglo-Canadian team led by CNRS researcher Fabien Condamine from the Institute of Evolutionary Science of Montpellier (CNRS / IRD / University of Montpellier), which studied evolutionary trends during the Cretaceous for six major families of dinosaurs, including those of the tyrannosaurs, triceratops, and hadrosaurs. Using a novel statistical modelling method that limited bias associated with gaps in the fossil record, they demonstrated that, for dinosaurs 76 million years ago, extinctions outpaced speciations. The impact of a 12-km-wide asteroid 66 million years ago was thus the coup de grâce for an animal group already struggling. These findings, published in Nature Communications on 29 June, show that the demise of dinosaurs was probably tied to global cooling towards the end of the Cretaceous,* when the mean global temperature fell by 7 °C. According to the researchers, herbivores were particularly affected by the first extinctions of this period, and this may have disturbed the equilibrium of ecosystems, setting off cascading extinctions among the other dinosaur families.
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Butterfly effect can double travel of virus-laden droplets
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WASHINGTON, June 29, 2021 -- Computer simulations have been used with great success in recent months to visualize the spread of the COVID-19 virus in a variety of situations. In Physics of Fluids, by AIP Publishing, researchers explain how turbulence in the air can create surprising and counterintuitive behavior of exhaled droplets, potentially laden with virus.
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Patients with acute myocarditis following mRNA COVID-19 vaccination
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What The Study Did: This study describes four patients who presented with acute myocarditis after mRNA COVID-19 vaccination.
Authors: Raymond J. Kim, M.D., of the Duke Cardiovascular Magnetic Resonance Center in Durham, North Carolina, is the corresponding author.
To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/
(doi:10.1001/jamacardio.2021.2828)
Editor's Note: The article includes conflict of interest disclosures. Please see the articles for additional information, including other authors, author contributions and affiliations, conflicts of interest and financial disclosures, and funding and support.
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Myocarditis Following Immunization With mRNA COVID-19 vaccines in members of US military
2021-06-29
What The Study Did: Researchers describe myocarditis presenting after COVID-19 mRNA vaccination in 23 patients within the Military Health System.
Authors: Jay Montgomery, M.D., of Walter Reed National Military Medical Center in Bethesda, Maryland, and Margaret Ryan, M.D., M.P.H., of the Naval Medical Center San Diego, are the corresponding authors.
To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/
(doi:10.1001/jamacardio.2021.2833)
Editor's Note: The article includes conflict of interest disclosures. Please see the articles for additional information, including other authors, author contributions and affiliations, conflicts of interest and financial disclosures, and funding ...
Selection tool accurately predicts ovarian damage in girls with cancer
2021-06-29
This press release is in support of a presentation by Dr Ruth Howie presented online at the 37th Annual Meeting of ESHRE.
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Pretreating nuisance green algae with lye, urea increases bacterial production of biogas
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The evolution of axial patterning
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