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כתבות אחרונות מאתר 'Phys'
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Researchers link specific microbiomes to archaeological bone degradation‎

Well-preserved archaeological bone samples have different microbial communities than heavily degraded bone samples, providing a new understanding of how microbes contribute to bone degradation, according to a study published in PLOS One by Damla Kaptan from the University of Stavanger, Norway, and colleagues. This study combines detailed analyses of archaeological bone degradation with analyses of microbiome diversity, providing new insights into how microbes may contribute to long-term bone preservation and decay.

21:01
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Phys

A severed piece of sea cucumber refused to die, and what happened next could transform medicine‎

From the revived corpse of Frankenstein's monster to the disembodied hand, "Thing," in the Addams Family, reanimated tissue is one of the most enduring images in science fiction. It turns out, that image has some basis in nature, according to the recent discovery of a mysterious creature that lives on the seafloor that scientists are calling a "real-life zombie."

21:01
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Phys

Hubble spies faint irregular galaxy ESO 490-017‎

This NASA Hubble Space Telescope image features the dwarf irregular galaxy ESO 490-017, roughly 12,000 light-years in diameter and some 23 million light-years away in the constellation Canis Major. The galaxy's low surface brightness makes it appear as a faint, starry swarm behind brighter foreground stars that are easily recognized by their diffraction spikes. Numerous red, orange, and beige dots are distant galaxies peppering the black background, many exhibiting distinct spiral structure.

21:01
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Phys

Moon base missions face an unseen threat, and these simulations show where it could strike first‎

Researchers have developed a novel virtual model for simulating how astronauts in future moon base operations might interact with each other and with their environment, with preliminary simulations revealing potential opportunities to boost the chances of a successful mission. Raymond Vera and colleagues at George Mason University in Virginia, U.S., present these findings in PLOS One.

21:01
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Phys

'Feathered dragon' has some of the longest tail feathers ever found on a fossil bird‎

Birds have all kinds of fancy decorations for attracting mates—male peacocks have a fan of feathers accented with shimmering blue eye-spots, birds of paradise do courtship dances that highlight their fluffy plumes, and female mallard ducks pick males with shiny green heads and bright yellow bills.

21:01
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Phys

Scientists reveal how dividing cells precisely trigger spindle formation‎

During animal cell division, a highly synchronized and tightly regulated dance of chromosomes takes place, ensuring the chromosomes split correctly into the two cells. Spindle fibers—complex machinery responsible for choreographing this dance—form from each end of the cell and push and pull the chromosomes through the process. But scientists still do not fully understand how cells control where and when the spindle fibers themselves form.

21:01
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Phys

Single tissue snapshot reveals biological processes unfolding over time‎

A core challenge in biology is understanding how processes in the body, such as cellular development and regeneration, unfold over long stretches of time, making them notoriously difficult to view at the molecular level. Now, a team led by researchers at Caltech has shown that a single snapshot of a mouse testis is enough to reconstruct the entire weeks-long cycle of sperm production, along with the cell-to-cell coordination that organizes it.

20:46
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Phys

Manager quality can match entire team's output, controlled experiments reveal‎

A good manager can be just as important to a company's performance as the combined productive capacity of its employees. This is shown in a new international study, published in The Quarterly Journal of Economics. The study also shows that those who are most eager to become managers are not necessarily the best suited to the role.

20:46
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Phys

Rare observations reveal an X9 solar flare before it erupts‎

Solar flares are powerful bursts of radiation from the sun's surface, which can wreak havoc on Earth's power grids, damage orbiting satellites, and pose serious radiation risks to astronauts. Yet despite decades of study, the processes that trigger these eruptions remain poorly understood.

20:46
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Phys

Researchers urge greater protections against online sexual abuse of children‎

A team of Georgia State University researchers is calling for digital platforms to implement stronger safety measures in response to a new study that highlights widespread online child sexual abuse.

20:26
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