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IMAGE: The upper left figure shows the spectra brightness versus wavelength for two supernovae. One is nearby and one is very distant. To measure dark energy, scientists need to. view more
Credit: Graphic credit: Zosia Rostomian/Berkeley Lab; photo credit: NASA/ESA)
Cosmologists have found a way to double the accuracy of measuring distances to supernova explosions - one of their tried-and-true tools for studying the mysterious dark energy that is making the universe expand faster and faster. The results from the Nearby Supernova Factory (SNfactory) collaboration, led by Greg Aldering of the Department of Energy s Lawrence Berkeley National Laboratory (Berkeley Lab), will enable scientists to study dark energy with greatly improved precision and accuracy, and provide a powerful crosscheck of the technique across vast distances and time. The findings will also be central to major upcoming cosmology experiments that will use new ground and space telescopes to te
New Indicator for Oxygen Levels in Early Oceans Developed Details
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Oxygen is essential for the development of higher life. However, it was hardly present in the oceans of the young Earth.
Oxygen is essential for the development of higher life. However, it was hardly present in the oceans of the young Earth. It was not until the evolution of photosynthetic bacteria that the oceans saw a significant increase in oxygen levels. By measuring tungsten isotope composition, an international research team with the participation of scientists from the University of Cologne’s Institute of Geology and Mineralogy has now laid the foundation for a more precise determination of the development of oxygen levels in the early oceans over time. Prospectively, they expect more precise insights into the evolution of life. In cooperation with scientists from ETH Zurich, the Universities of Bern and Tübingen, and the Leibniz Institute for Baltic Sea Research War
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IMAGE: With the research vessel Elisabeth Mann Borgese, the research team set out to collect seawater samples in the Baltic Sea. The geologists hope to gain insights into the oxygen content. view more
Credit: Leibniz Institute for Baltic Sea Research Warnemünde (IOW)
Oxygen is essential for the development of higher life. However, it was hardly present in the oceans of the young Earth. It was not until the evolution of photosynthetic bacteria that the oceans saw a significant increase in oxygen levels. By measuring tungsten isotope composition, an international research team with the participation of scientists from the University of Cologne s Institute of Geology and Mineralogy has now laid the foundation for a more precise determination of the development of oxygen levels in the early oceans over time. Prospectively, they expect more precise insights into the evolution of life. In cooperation with scientists from ETH Zurich, the Universities of Bern and Tüb