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Four new DAQ white dwarfs discovered

Four new DAQ white dwarfs discovered

Astronomers from the University of Oklahoma and their colleagues report the detection of four white dwarf stars of a recently discovered rare DAQ spectral subclass. The newfound white dwarfs are slightly more massive than the sun. The finding was detailed in a research paper published March 13 on the preprint server arXiv.

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Scientists detail research to assess the viability and risks of marine cloud brightening

Scientists detail research to assess the viability and risks of marine cloud brightening

As the levels of greenhouse gases in the atmosphere continue to increase and climate change impacts become more costly‚ the scientific community is redoubling efforts to investigate the potential risks and benefits of artificially shading Earth's surface to slow global warming.

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An approach to design high-power lithium sulfur batteries

An approach to design high-power lithium sulfur batteries

Lithium–sulfur (Li–S) batteries are a promising alternative to lithium–ion batteries (LiBs)‚ the most common rechargeable battery technology. As sulfur is abundant on Earth‚ these batteries could be cheaper and more environmentally friendly than LiBs‚ while also potentially exhibiting higher energy densities.

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Unveiling the formation of the first galaxies

Unveiling the formation of the first galaxies

Utilizing high-resolution three-dimensional radiation hydrodynamics simulations and a detailed supernova physics model run on supercomputers‚ a research team led by Dr. Ke-Jung Chen from the Institute of Astronomy and Astrophysics‚ Academia Sinica (ASIAA) has revealed that the physical properties of the first galaxies are critically determined by the masses of the first stars. Their study is published in The Astrophysical Journal.

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Plant material on obsidian blades on Rapa Nui suggests settlers there visited South America and returned

Plant material on obsidian blades on Rapa Nui suggests settlers there visited South America and returned

A team of archaeologists affiliated with several institutions in Chile reports evidence that early settlers on the island of Rapa Nui sailed to South America‚ interacted with people living there and then returned. In their study‚ published in PLOS ONE‚ the group analyzed plant material found on obsidian blades made by the early settlers.

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Say hello to biodegradable microplastics: Plant-based polymers that can disappear within seven months

Say hello to biodegradable microplastics: Plant-based polymers that can disappear within seven months

Microplastics are tiny‚ nearly indestructible fragments shed from everyday plastic products. As we learn more about microplastics‚ the news keeps getting worse. Already well-documented in our oceans and soil‚ we're now discovering them in the unlikeliest of places: our arteries‚ lungs and even placentas.

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New method for analyzing nanoporous materials

New method for analyzing nanoporous materials

In addition to their main components‚ the properties of crystalline and nanoporous materials often depend crucially on guest atoms or ions that are embedded in the tiny pores of their lattice structure. This applies to high-tech materials used in sensor or separation technology as well as to natural materials. The bluish gemstone aquamarine‚ for example‚ would be colorless without such guest components.

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Researchers discover new route to recyclable polymers from plants

Researchers discover new route to recyclable polymers from plants

Researchers at Hokkaido University have taken a significant step forward in the drive to make recyclable yet stable plastics from plant materials. This is a key requirement to reduce the burden of plastic pollution in the environment. They developed a convenient and versatile method to make a variety of polymers from chemicals derived from plant cellulose; crucially‚ these polymers can be fully recycled. The method was published in the journal ACS Macro Letters.

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Rays were more diverse 150 million years ago than previously thought

Rays were more diverse 150 million years ago than previously thought

In a new study published in the journal Papers in Palaeontology‚ an international team of scientists led by paleobiologist Julia TÃ¼rtscher from the University of Vienna has explored the puzzling world of rays that lived 150 million years ago and discovered a previously hidden diversity—including a new ray species. This study significantly expands the understanding of these ancient cartilaginous fish and provides further insights into a past marine ecosystem.

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Excess temperatures found to cause low flocking concerns in Australia

Excess temperatures found to cause low flocking concerns in Australia

High temperatures during critical periods of the reproductive cycle of sheep result in 2.1 million fewer lambs produced in Australia each year‚ costing sheep farmers an estimated $97 million annually.

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