This marine catastrophe has previously been attributed to a cooling event of a warm Earth, as a glacier can be seen to grow on the South Pole, and to increased oxygen in the ocean.
The cooling appears to be real, but from a hot to less hot greenhouse planet which not necessarily led to stress for the animals.
Also, instead of increasing oxygen the resent results point towards severe lack of oxygen at depth in the ocean. The conclusion of ocean anoxia is inferred primarily from sulfur isotope data from sea floor sediments in three ocean basins worldwide.
The new data overthrows century old knowledge of why marine animals met their first of three major challenges, and highlights how evolution of life is tightly coupled to the dynamics of oxygen in the ocean.
Emma Hammarlund | EurekAlert!
Exoplanet stepping stones
21.11.2018 | W. M. Keck Observatory
First diode for magnetic fields
21.11.2018 | Universität Innsbruck
Innsbruck quantum physicists have constructed a diode for magnetic fields and then tested it in the laboratory. The device, developed by the research groups led by the theorist Oriol Romero-Isart and the experimental physicist Gerhard Kirchmair, could open up a number of new applications.
Electric diodes are essential electronic components that conduct electricity in one direction but prevent conduction in the opposite one. They are found at the...
Max Planck researchers revel the nano-structure of molecular trains and the reason for smooth transport in cellular antennas.
Moving around, sensing the extracellular environment, and signaling to other cells are important for a cell to function properly. Responsible for those tasks...
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
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21.11.2018 | Life Sciences
21.11.2018 | Medical Engineering
21.11.2018 | Physics and Astronomy