724,896 articles

Cats can infect each other with coronavirus, Chinese study finds

Feline transmission to humans not shown but infected pet owners warned to be carefulCoronavirus – latest updatesSee all our coronavirus coverageCat owners may wish to be more cautious about contact with their pets as a study from China has revealed Covid-19 can be transmitted between cats.The team, at Harbin Veterinary Research Institute in China, found that cats are highly susceptible to...

Coronavirus live news: Italy records lowest daily increase in deaths in a week

Germany and Italy extend lockdowns; Spain cases pass 100,000; global cases near 900,000; record daily fatalities in UKUS coronavirus - latest updatesAt a glance: summary of key events Wimbledon cancelled due to coronavirus crisisBrazil state governors ignore Bolsonaro amid anger over handling of crisis See all our coronavirus coverage 7.00pm BST The Scottish government has significantly increased...

Physical force alone spurs gene expression, study reveals

Cells will ramp up gene expression in response to physical forces alone, a new study finds. Gene activation, the first step of protein production, starts less than one millisecond after a cell is stretched—hundreds of times faster than chemical signals can travel, the researchers report.

Skull scans reveal evolutionary secrets of fossil brains

Scientists have long been able to measure and analyze the fossil skulls of our ancient ancestors to estimate brain volume and growth. The question of how these ancient brains compare to modern human brains and the brains of our closest primate cousin, the chimpanzee, continues to be a major target of investigation.

Homo naledi juvenile remains offers clues to how our ancestors grew up

A partial skeleton of Homo naledi represents a rare case of an immature individual, shedding light on the evolution of growth and development in human ancestry, according to a study published April 1, 2020 in the open-access journal PLOS ONE by Debra Bolter of Modesto Junior College in California and the University of the Witwatersrand, Johannesburg, and colleagues.

Pausing the World to Fight Coronavirus Has Carbon Emissions Down—But True Climate Success Looks Like More Action, Not Less

Runaway exponential growth. Unprecedented economic impacts. Untold deaths and suffering, especially among the poor and vulnerable. All these superlatives are sadly apt descriptors for the COVID-19 crisis unfolding in front of our eyes. They also apply to climate change. But while the slowdown in activity due to COVID-19 has led to a temporary fall in China’s carbon dioxide emissions by up...

BESSY II: Ultra-fast switching of helicity of circularly polarized light pulses

At the BESSY II storage ring, a joint team of accelerator physicists, undulator experts and experimenters has shown how the helicity of circularly polarized synchrotron radiation can be switched faster—up to a million times faster than before. They used an elliptical double-undulator developed at HZB and operated the storage ring in the so-called two-orbit mode. This is a special mode of...

Chemistry education goes online

With colleges and universities around the world shuttered because of the COVID-19 pandemic, chemistry teachers are navigating the shift to online learning. There are several factors to consider in this effort, from technology to accessibility. Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society, asked chemistry teachers with online learning experience to...

NHS rules hampering coronavirus testing drive, say scientists

Strict standardisation of chemical brands and suppliers said to be a factor in delaysCoronavirus – latest updatesSee all our coronavirus coverageThe introduction of mass testing for coronavirus is being hampered by health officials enforcing strict rules around what chemical brands and suppliers can be used to produce the tests, scientists warn.Procedures drawn up by the NHS describe the precise...

Tiny fly from Los Angeles has a taste for crushed invasive snails

As part of their project BioSCAN - devoted to the exploration of the unknown insect diversity in and around the city of Los Angeles—the scientists at the Natural History Museum of Los Angeles County (USA) have already discovered numerous insects that are new to science, but they are still only guessing about the lifestyles of these species.

Possible lives for food waste from restaurants

More than a third of the food produced ends up being wasted. This situation creates environmental, ethical and financial issues, that also affect food security. Negative effects from waste management, such as bad smells or the emission of greenhouse gases, make the bioeconomy one of the best options to reduce these problems.

Surprising hearing talents in cormorants

Many aquatic animals like frogs and turtles spend a big part of their lives under water and have adapted to this condition in various ways, one being that they have excellent hearing under water.

Stable perovskite LEDs one step closer

Researchers at Linköping University, working with colleagues in Great Britain, China and the Czech Republic, have developed a perovskite light-emitting diode (LED) with both high efficiency and long operational stability. The result has been published in Nature Communications.

Fish have diverse, distinct gut microbiomes

The rich biodiversity of coral reefs even extends to microbial communities within fish, according to new research. The study reports that several important grazing fish on Caribbean coral reefs each harbor a distinct microbial community within their guts, revealing a new perspective on reef ecology.

Understanding brain tumors in children

The causes of 40% of all cases of certain medulloblastomas -- dangerous brain tumors affecting children -- are hereditary. A genetic defect that occurs in 15% of these children plays a key role by destabilizing the production of proteins. The researchers suspect that protein metabolism defects could be a previously underestimated cause of other types of cancer.

Scientists see energy gap modulations in a cuprate superconductor

Scientists studying high-Tc superconductors have definitive evidence for the existence of a state of matter known as a pair density wave -- first predicted by theorists some 50 years ago. Their results show that this phase coexists with superconductivity in a well-known bismuth-based copper-oxide superconductor.

How dopamine drives brain activity

Using a specialized magnetic resonance imaging (MRI) sensor that can track dopamine levels, neuroscientists have discovered how dopamine released deep within the brain influences distant brain regions.

Blocking the iron transport could stop tuberculosis

The bacteria that cause tuberculosis need iron to survive. Researchers have now solved the first detailed structure of the transport protein responsible for the iron supply. When the iron transport into the bacteria is inhibited, the pathogen can no longer grow. This opens novel ways to develop targeted tuberculosis drugs.

Elephant welfare can be assessed using two indicators

In two new studies, scientists have investigated how to measure stress in semi-captive working elephants. The studies suggest that both physiological and behavioral approaches can be used to reliably assess the well-being of semi-captive Asian elephants.

About the distribution of biodiversity on our planet

Large open-water fish predators such as tunas or sharks hunt for prey more intensively in the temperate zone than near the equator. With this result, a study is challenging a long-standing explanation for the distribution of biodiversity on our planet.

Researchers develop novel corona test

As requested by the Austrian Federal Government and the WHO, a significant increase in the capacity for coronavirus testing is essential to combat the new coronavirus. The University of Innsbruck is now responding to this by immediately developing and evaluating a new high-throughput method for the genetic analysis of patient samples at its Faculty of Biology.

Models explain changes in cooking meat

Meat is no ordinary solid. Made up of complex networks of moisture-saturated proteins, it displays some intriguing physical properties when it is cooked. Several studies in the past have attempted to recreate this behaviour in computer simulations, but because this demands so much computing power, they have only achieved simplified, one-dimensional recreations of the process, which aren't...

Elephant welfare can be assessed using two indicators

Across the world, animals are kept in captivity for various reasons: in zoos for education and research, in research facilities for testing, on farms for meat and other products, and in people's homes as pets. Maintaining good animal welfare is not only important for ethical reasons; poor welfare can impact human wellbeing and the economy. But how do we assess how animals are feeling?

New 3-D cultured cells mimic the progress of NASH

A research team led by scientists from Tokyo University of Agriculture and Technology (TUAT), Japan, has successfully established 3-D cultured tissue that mimics liver fibrosis, a key characteristic of non-alcoholic steatohepatitis (NASH). For making the 3-D culture, cells were collected from liver tissues of NASH model mice. Their findings open up an alternative avenue for developing drugs for...

The candy-cola soda geyser experiment, at different altitudes

Dropping Mentos candies into a bottle of soda causes a foamy jet to erupt. Although science fair exhibitors can tell you that this geyser results from rapid degassing of the beverage induced by the candies, the precise means by which bubbles form hasn't been well characterized. Now, researchers reporting in ACS' Journal of Chemical Education used experiments in the lab and at various altitudes to...

The discovery of new compounds for acting on the circadian clock

The circadian clock controls a variety of biological phenomena that occur during the course of the day, such as sleeping and waking. Perturbation of the circadian clock has been associated with many diseases such as sleep disorders, metabolic syndrome, and cancer. The development of small-molecule compounds to regulate specific components of the circadian clock facilitates the elucidation of the...

The young Brazilians fighting for the Amazon

Maria dreams of being the next Greta Thunberg. Kelita is studying in the first-ever university program in the Amazon. Fabio is helping his family do its part to fight climate change through sustainable agriculture.

Global Air Pollution Has Fallen Due to the Coronavirus Outbreak, but Experts Warn It Isn’t a Silver Lining

Around the world an unexpected impact of the economic shuttering due to the coronavirus outbreak is striking blue skies and clear water in places, from Venice to Beijing, Los Angeles to Bangalore, where only weeks ago pollution dominated. COVID-19 has driven the global economy to a near-halt as the pandemic sweeps the globe. With factories shuttered and cars parked in garages, air pollution has...