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225,709 articles from PhysOrg

My favorite Martian image: Helicopter scouts ridge area for Perseverance

Ask any space explorer, and they'll have a favorite photo or two from their mission. For Kevin Hand, a scientist at NASA's Jet Propulsion Laboratory in Southern California and co-lead of the Perseverance rover's first science campaign, his latest favorite is a 3D image of low-lying wrinkles in the surface of Jezero Crater. The science team calls this area "Raised Ridges." NASA's Ingenuity Mars...

Researchers around the world are buzzing about a candidate superconductor

Since receiving a $25 million grant in 2019 to become the first National Science Foundation (NSF) Quantum Foundry, UC Santa Barbara researchers affiliated with the foundry have been working to develop materials that can enable quantum information-based technologies for such applications as quantum computing, communications, sensing, and simulation.

Using graphene foam to filter toxins from drinking water

Some kinds of water pollution, such as algal blooms and plastics that foul rivers, lakes, and marine environments, lie in plain sight. But other contaminants are not so readily apparent, which makes their impact potentially more dangerous. Among these invisible substances is uranium. Leaching into water resources from mining operations, nuclear waste sites, or from natural subterranean deposits,...

Barriers to voting in elections linked to increased odds of being uninsured

Groups commonly targeted by voting restriction laws—those with low incomes, who are racial minorities, and who are young—are also less likely to be insured in states with more voting restrictions, according to a study by researchers at Columbia University Mailman School of Public Health and University of Alberta School of Public Health, Edmonton, Canada. However, those who are wealthier, white...

Increase in extreme precipitation in the northeast caused by Atlantic variability and climate change

Recent record-breaking rainfall across the northeastern United States is part of a larger trend. From Maine to West Virginia, the Northeast has seen an abrupt increase in extreme precipitation—heavy rain and snow resulting in about 1 to 2 inches of water in a day depending on location since 1996, which has coincided with warming sea surface temperatures in the North Atlantic. Northeast extreme...

Muscle protein that makes vertebrates more fit linked to limited lifespan

Researchers from Johns Hopkins Medicine say they have added to evidence that a protein called CaMKII improves strength, endurance, muscle health and fitness in young animals. Their experiments working with mice and fruit flies, however, found that the gene for CaMKII also contributes to an evolutionary tradeoff: increased susceptibility to age-associated diseases, frailty and mortality.

Effective EMI shielding behavior of thin graphene/PMMA nanolaminates

Since its isolation in 2004 by Geim and Novoselov from the University of Manchester (Nobel Prize in Physics in 2010), graphene has been termed a 'wonder material' due to its exceptional properties, which have already been exploited in many applications and products. However, the use of graphene in the form of tiny flakes in polymer composites limits the full exploitation of its excellent...

Fighting antibiotic resistance with phages

Farmers around the world rely on antibiotics to keep livestock healthy, but increased bacterial resistance has created problems for both animals and humans. Instead of expensive new drugs, scientists have found a potential affordable solution that comes from nature. A new article in Chemical & Engineering News, the weekly newsmagazine of the American Chemical Society, details how bacteriophages...

Manipulating magnetic domain dynamics in ultrathin multi-layered materials

A novel route to tune and control the magnetic domain wall motions employing combinations of useful magnetic effects inside very thin film materials, has been demonstrated by researchers from Daegu Gyeongbuk Institute of Science and Technology (DGIST) in Korea. The research, published in the journal Advance Science, offers a new insights into spintronics and a step towards new ultrafast,...

German flood risks were clearly underestimated

To better estimate flood risks, risk maps should also consider historical data. This is recommended by researchers of CEDIM—Center for Disaster Management and Risk Reduction Technology of Karlsruhe Institute of Technology (KIT). CEDIM has now presented its first report on the flood disaster in Rhineland-Palatinate and North Rhine-Westphalia. As regards the role of climate change, the combination...

When vibrations increase on cooling: Anti-freezing observed

An international team has observed an amazing phenomenon in a nickel oxide material during cooling: Instead of freezing, certain fluctuations actually increase as the temperature drops. Nickel oxide is a model system that is structurally similar to high-temperature superconductors. The experiment shows once again that the behavior of this class of materials still holds surprises.

Can AI make democracy fairer?

Democracy in ancient Athens looked quite different from democracies today. Instead of elections, most offices—including those in the legislature, governing councils, and magistrates—were filled by citizen volunteers, selected by random lottery. These citizens' assemblies drafted, debated, and passed laws; made major foreign policy decisions; and controlled military budgets. 

Microplastics discovered in the Arctic ecosystem

Around the Svalbard archipelago in the Arctic Ocean, rhodoliths made up of coralline red algae provide ecological niches for a wide variety of organisms. A team of researchers from Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), the University of Bayreuth and Senckenberg Research Institute in Wilhelmshaven has recently discovered a large quantity of microplastics in this ecosystem.

Biotech startup aims for 'new paradigm' in medicine by parsing proteins

DNA testing is one of modern medicine's most significant breakthroughs. Today, anyone can receive personalized information about their genes and ancestry with just a little saliva. Now, a Seattle-based company is working to bring equally deep analysis to another set of complicated molecules in humans: the trillions of proteins circulating within our bodies.

Study reveals how smell receptors work

All senses must reckon with the richness of the world, but nothing matches the challenge faced by the olfactory system that underlies our sense of smell. We need only three receptors in our eyes to sense all the colors of the rainbow—that's because different hues emerge as light-waves that vary across just one dimension, their frequency. The vibrant colorful world, however, pales in comparison...

137 human genomes from the Middle East fill gaps in human history

Whole-genome sequencing efforts around the world have offered important insights into human diversity, historical migrations, and the relationships between people of different regions—but scientists still don't have a complete picture because some regions and people remain understudied. A new study reported in the journal Cell on August 4 helps to fill one of these big gaps by generating more...