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119 articles from PhysOrg
Decline in black cherry regeneration may herald wider forest change
In the heart of black cherry's native range, including a part of the Allegheny Hardwoods that bills itself as the "Black Cherry Capital of the World," the tree's regeneration, growth and survival have all been declining for more than a decade. In a new analysis, a team of USDA Forest Service and University of Missouri scientists identify likely factors behind the tree's decline and, more...
Reading between the diamonds: Scientists expand deep carbon story
The high temperatures and pressures of the Earth's mantle forge carbon-rich minerals known as carbonates into diamond. But less is known about the fate of carbonates that travel even deeper underground—depths from which no sample has ever been recovered.
US report: Bald eagle populations soar in lower 48 states
The number of American bald eagles has quadrupled since 2009, with more than 300,000 birds soaring over the lower 48 states, government scientists said in a report Wednesday.
Asian Americans report biggest increase in serious incidents of online hate and harassment during COVID pandemic
Asian Americans reported the single biggest increase in serious incidents of online hate and harassment as racist and xenophobic slurs blaming people of Asian descent for the coronavirus pandemic spread over the past year, according to a new survey shared exclusively with U.S. TODAY.
Deadly heat waves will be common in South Asia, even at 1.5 degrees of warming
Residents of South Asia already periodically experience heat waves at the current level of warming. But a new study projecting the amount of heat stress residents of the region will experience in the future finds with 2 degrees Celsius of warming, the population's exposure to heat stress will nearly triple.
New method could shine 'a healing light' on the brain for those with movement disorders
Scientists make pivotal discovery of method for wireless modulation of neurons with X-rays that could improve the lives of patients with brain disorders. The X-ray source only requires a machine like that found in a dentist's office.
'Silencing' protein to weaken COVID-19
When invaded by a virus, our body cells launch an alert to neighboring cells to increase their antiviral defenses to prevent the infection from spreading. Some viruses, however, manage to bypass this system by mimicking the host's RNA, preventing them from being detected by the infected cell and avoiding this alert. In the case of SARS-CoV-2, this mimicking uses a protein known as nsp14. This...
Illinois is 'kind of the place to be with periodical cicadas,' researchers say as 17-year brood expected
For nearly two decades, they've hung out underground, preparing for the day they'll writhe up into our world, make a lot of noise, have sex and die.
New machine learning tool diagnoses electron beams in an efficient, non-invasive way
Beams of accelerated electrons power electron microscopes, X-ray lasers, medical accelerators and other devices. To optimize the performance of these applications, operators must be able to analyze the quality of the beams and adjust them as needed.
Searching the ocean for one of the world's rarest whales
Crowded into a tiny plane, 1,000 feet above the water off Georgia, the surveyors look down in search of a disturbance—a long splash, or a dark patch amid all that blue.
Chandra X-ray data sonification: Stellar, galactic, and black hole
This latest installment from our data sonification series features three diverse cosmic scenes. In each, astronomical data collected by NASA's Chandra X-ray Observatory and other telescopes are converted into sounds. Data sonification maps the data from these space-based telescopes into a form that users can hear instead of only see, embodying the data in a new form without changing the original...
Bronze Age mining sites received deliveries of pre-processed foods
Bronze Age mining sites relied on outside sources to deliver pre-processed food to sustain the community, according to a study published March 24, 2021 in the open-access journal PLOS ONE by Andreas Heiss of the Austrian Academy of Sciences and colleagues.
Ancient Maya houses show wealth inequality is tied to despotic governance
Every society has some degree of wealth inequality—over history, across continents, there always seem to be some people who have more than others. But the amount of inequality differs—in some civilizations, a few powerful people have nearly all the wealth, whereas in others, it's more spread out. In a new study in PLOS ONE, archaeologists examined the remains of houses in ancient Maya cities...
Aerosol formation in clouds: Studying climate modeling's last great uncertainty factor
Researchers at the Paul Scherrer Institute PSI have studied for the first time how chemical reactions in clouds can influence the global climate. They found that isoprene, the dominant non-methane organic compound emitted into the atmosphere, can strongly contribute to the formation of organic aerosols in clouds. They published their results today in the journal Science Advances.
Weird earthquake reveals hidden mechanism
The wrong type of earthquake in an area where there should not have been an earthquake led researchers to uncover the cause for this unexpected strike-slip earthquake—where two pieces of crust slide past each other on a fault—in places where subduction zone earthquakes—one geologic plate slipping beneath another—are common.
New study triples estimate of red snapper in Gulf of Mexico
There are about three times as many red snapper as previously estimated in the Gulf of Mexico, according to a study released Wednesday about the popular game and table fish over which recreational anglers and federal regulators have fought for years.
Cosmic mouthful: Tasters savor fine wine that orbited Earth
It tastes like rose petals. It smells like a campfire. It glistens with a burnt-orange hue. What is it? A 5,000-euro bottle of Petrus Pomerol wine that spent a year in space.
Fighting 'forever chemicals' with microbes
Per- and polyfluoroalkyl substances (PFAS) are some of the most persistent environmental pollutants, earning them the moniker "forever chemicals." Increasing concern about the adverse health effects of PFAS exposure has researchers seeking novel ways to break down the stubborn pollutants. A cover story in Chemical & Engineering News, the weekly newsmagazine of the American Chemical Society, that...
News media keeps pressing the mute button on women's sports
The talented athletes are there. The cheering fans are there. But the media? It's nowhere to be found.
Researchers show path to zero-emissions LA
Powering Los Angeles entirely with renewable energy can be accomplished without significant disruption to the economy or lifestyles over the next 25 years, if not sooner, according to new research conducted by USC experts for the city and federal government.
Scientists improve a photosynthetic enzyme by adding fluorophores
Given the finite nature of fossil fuel reserves and the devastating environmental impacts of relying on fossil fuels, the development of clean energy sources is among the most pressing challenges facing modern industrial civilization. Solar energy is an attractive clean energy option, but the widescale implementation of solar energy technologies will depend on the development of efficient ways of...
Automatic trail cameras keep wildlife research going during pandemic
For scientists, especially graduate students, who conduct fieldwork, every day is precious. Researchers meticulously prepare their equipment, procedures and timelines to make sure they get the data they need to do good science. So you can imagine the collective anxiety that fell across academia in spring 2020 when COVID-19 struck and many universities suspended in-person activities, including...
Beware of fellow bacteria bearing gifts: Research presents new potential antimicrobial agents
Skoltech researchers examined the antibiotic compounds that employ a 'Trojan horse' strategy to get into a bacterial cell unrecognized and prevent the synthesis of proteins, ultimately killing the cell. They were able to identify new gene clusters that look like those of known 'Trojan horses' - these likely guide the biosynthesis of new antimicrobials that require further investigation. The review...
Dangerous landfill pollutants ranked in order of toxicity
Nearly 2,000 active landfills are spread across the U.S., with the majority of garbage discarded by homes and businesses finding its way to a landfill. The resulting chemicals and toxins that build up at these sites can then leach into soil and groundwater, and this "leachate" can present serious hazards to the environment and to the people who live nearby.
Small robot swimmers that heal themselves from damage
Living tissue can heal itself from many injuries, but giving similar abilities to artificial systems, such as robots, has been extremely challenging. Now, researchers reporting in ACS' Nano Letters have developed small, swimming robots that can magnetically heal themselves on-the-fly after breaking into two or three pieces. The strategy could someday be used to make hardier devices for...