ניווט נגישות
כתבות אחרונות מאתר 'Phys'
Phys

Soil food webs grow more varied in farmland and tropics, global analysis reveals‎

Soils are home to some of the most diverse animal communities on Earth. These animals—including nematodes, springtails, mites, earthworms, spiders and other arthropods—drive decomposition, regulate microbial communities and contribute to nutrient cycling. However, little is known about how these animals' trophic diversity—meaning the variety of feeding activities—is affected by land use and climate.

01:05
תפריט כתבה
Phys

How a single radioactive cloud caused Fukushima particle contamination‎

A new study shows that a single radioactive cloud was responsible for a large share of the nuclear fallout during the Fukushima Daiichi nuclear disaster on 11 March 2011. The work is published in the Journal of Hazardous Materials.

01:05
תפריט כתבה
Phys

Perseverance rover snaps selfie in western frontier of Mars‎

NASA's Perseverance Mars rover recently took a self-portrait against a sweeping backdrop of ancient Martian terrain at a location the science team calls Lac de Charmes. Assembled from 61 individual images, the selfie shows Perseverance training its mast on a rocky outcrop on which it had just made a circular abrasion patch, with the western rim of Jezero Crater stretching into the background. The selfie was captured on March 11, the 1,797th Martian day (sol) of the mission, during the rover's deepest push west beyond the crater.

00:45
תפריט כתבה
Phys

Novel technique measures polymer degradation during cathodic overprotection‎

Oil and natural gas are vital constituents of our energy ecosystem that need to be transported across long distances. Although steel pipelines are the infrastructure used for this purpose, thereby serving as the lifeline for crucial energy distribution, they introduce the added challenge of corrosion. Steels typically rust when exposed to aggressive environments and are coated with various types of polymer coatings to delay, if not completely inhibit the onset of corrosion.

00:45
תפריט כתבה
Phys

Human childbirth is not uniquely difficult among mammals‎

Human childbirth is commonly viewed as uniquely difficult and dangerous. The reason: The combination of bipedalism and large brains creates a tight fit between the baby and the birth canal. Research at the University of Vienna has now shown that many other mammals—from domestic livestock to wild species—face similar birth problems and mortality. In some species, these complications even occur as often as in some human populations, such as hunter-gatherers without modern medical care. The findings suggest that difficult childbirth is not uniquely human. The study is published in Biological Reviews.

00:33
תפריט כתבה
Phys

Molecular glue could hijack cells' natural machinery to help treat diseases‎

Proteins do most of the work in our body's cells. But when a protein is too active or does not function properly, it can lead to disease or other health problems. Researchers from the University of Toronto have discovered a molecule, CLEO4-88, that acts as a "molecular glue," binding together two proteins to inactivate one of them. The finding—enabled by the Canadian Light Source (CLS) at the University of Saskatchewan—points to the possibility of one day treating disease by controlling the activity of harmful proteins.

00:26
תפריט כתבה
Phys

Video: Gels for cosmetics made from natural plant oils‎

Many creams and serums contain artificial ingredients that are harmful to the environment. Natural plant oils would be more sustainable but are difficult to process. ETH researcher Svitlana Mykolenko has developed a way of turning plant oils into stable gels without synthetic additives.

00:26
תפריט כתבה
Phys

The fog is alive: Droplets host bacteria that clear toxins from our air‎

What if fog isn't just misty air, but a living ecosystem? This question hung over cloud researcher Thi Thuong Thuong Cao. As a Ph.D. student at Arizona State University, her curiosity led her from knocking on the doors of microbiologists and chemists, to sampling fog before sunrise in Pennsylvania, to hours of peering through a lab's microscope. Finally, she found her answer. Her ASU research team found that bacteria floating in tiny fog droplets are alive, growing and (quite helpfully) breaking down pollutants in the air.

00:14
תפריט כתבה
Phys

TIME instrument unlocks faint signals from early galaxies across vast stretches of sky‎

Cornell astronomers are deploying a new instrument that grants them, for the first time, a better view of the universe's earliest galaxies, which can't be observed individually with traditional ground- or space-based telescopes.

00:05
תפריט כתבה
Phys

Authors of book about classroom AI say loss of foundational knowledge is biggest threat‎

Educators should teach students how to use AI tools but with an emphasis on the ethics, social impact, and potential biases of the tech, experts said Thursday during a conversation sponsored by Harvard Education Press.

00:05
תפריט כתבה
דיווח על כתבה זו הסתרת כתבות מאתר זה המשך קריאה באתר המקור