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Science
“#5000 eyes on the skies: Scientists choreograph robots to observe distant galaxies” Scientists have begun operating the Dark Energy Spectroscopic Instrument, or DESI, to create a 3-D map of over 30 million galaxies and quasars that will help them understand the nature of dark energy. Credit: Marilyn Sargent /Lawrence Berkeley National Laboratory Since 2005, scientists…
“#Emission from the blazar 1ES 1218 304 explored with NASA space telescopes” Multiwavelength light curve of 1ES 1218 304 during 2008-2020. Credit: Sahakyan et al., 2020. Using three NASA space observatories, astronomers have conducted a multiwavelength study of emission from a blazar known as 1ES 1218 304. Results of the investigation, presented in a paper…
“#Chemists resolve origin of perovskite instability” (Upper left) Room temperature Cs electron density from single crystal X-ray diffraction measurements showing significant elongation, a signature of rattling. (Bottom) Cs-I distances for the dominant Cs site CsA and secondary site CsB with (upper right) histogram of distances. Credit: Daniel Straus Researchers in the Cava Group at the…
“#A quarter of the world’s lowland population depends critically on mountain water resources” Mountains are important “Water Towers”. This is the Rosegbach River in Switzerland, part of the Danube river basin where a third of the 46 million people living downstream strongly depend on water resources from mountain areas. Credit: D. Viviroli Global water consumption…
“#Scientists reveal mechanism of dioxygen activation” Credit: Pixabay/CC0 Public Domain Metalloenzyme can couple dioxygen activation to substrate functionalization, which often exhibits unrivaled efficiency, even at ambient conditions. It is believed that metal-superoxo intermediates are formed in dioxygen activation, and then further reduced to metal-peroxo and ultimately to -oxo species. However, the chemistry of metal-superoxo complexes…
“#Seeking ancestral commonalities with modern human body type, researchers find stockier answer” Reconstructed upper body skeleton of the 1.5 million years old Homo erectus youth from West Turkana, Kenya. The ribcage was deeper, wider and shorter than in modern humans, suggesting a stockier body shape and a larger lung volume. Credit: Markus Bastir, CC-BY-NC-ND 4.0…
“#The impact of climate change on marmot survival differs between seasons” Credit: Pixabay/CC0 Public Domain Many animals have evolved life cycles and strategies (patterns of survival and reproduction) in line with predictable seasonal variation in environmental conditions. Short and mild summers produce bursts of vegetation and food, the perfect time to give birth to young….
“#Liquid crystal integrated metalens for versatile color focus” Liquid-crystal integrated metalens. Credit: Zhixiong Shen et al., Nanjing University. The development of metasurfaces opened a horizon for the advance of planar optics. Among metadevices, the metalens has attracted widespread attention for practical applications in imaging and spectroscopy, as it provides multifunctional wavefront manipulations for improved focus….
“#New global study reveals ‘time tree’ of Earth’s flowering plants” Angiosperm (flowering plants) “time tree.” Credit: Dr Santiago Ramírez-Barahona New research published today in Nature Ecology & Evolution by scientists from Australia and Mexico reveals the world’s first complete angiosperm “time tree”—a reconstruction of the evolution of the Earth’s flowering plants through time. The rise…
“#Increases in greenhouse gas, particulate pollution emissions drive regional drying around the globe” LLNL scientists and collaborators used fingerprinting — the process of separating the relative roles of natural and human influences on global climate — to identify how greenhouse gas and particulate pollution emissions drive regional drying around the globe. Credit: Lawrence Livermore National…