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כתבות אחרונות מאתר 'Phys'
Phys

DNA analysis illuminates the lives of East Marshall Street Well individuals‎

She had brown eyes and black hair. She was almost 5 feet, 7 inches tall and chewed tobacco. She was in her 20s, carried heavy loads with her left arm and had given birth. We don't know her name, but after her death in the 19th century, her body was stolen and used for anatomical and surgical training by students from the Medical College of Virginia. For more than 100 years, she lay among at least 46 others in a disused well on East Marshall Street in Richmond, before it was hurriedly excavated in 1994 during construction of the Hermes A. Kontos Medical Sciences Building on Virginia Commonwealth University's campus.

22:34
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Phys

Chemists synthesize first stable copper metallocene complex, closing a 70-year gap‎

Almost half a century ago, a remarkable molecule called metallocene took center stage in chemistry, earning Geoffrey Wilkinson and Ernst Otto Fischer the Nobel Prize. These organic compounds, made of a transition metal "sandwiched" between two flat, ring-shaped organic layers, have since become an integral part of new-age polymers, materials, and pharmaceuticals.

22:34
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Phys

Evidence points to early goat and sheep dairy consumption in Neolithic Iran‎

Approximately 9,000 years ago, human communities in Southwest Asia underwent a dramatic transformation, known as the Neolithic revolution. This period was marked by pronounced changes in how they lived and sourced food, with a shift from living on the move, hunting and gathering to permanently residing in one place, farming and herding of animals.

22:34
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Phys

The bouba-kiki effect: Baby chicks match sounds to shapes just like humans‎

When we hear certain sounds, our brains often pair them with specific shapes. For example, most people will associate a sharp-sounding word with a jagged, pointed shape, while a soft, rolling word is linked to something smooth and curved. This fascinating phenomenon is known as the bouba-kiki effect.

22:34
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Phys

Citizen science: Map the Earth's magnetic shield with the Space Umbrella Project‎

A stream of charged particles known as the solar wind flows from the sun toward Earth. Here, it meets Earth's magnetic fields, which shield our planet like a giant umbrella. The Space Umbrella project needs your help investigating this dynamic region, where NASA's Magnetosphere Multiscale (MMS) mission has been collecting data since 2015. The MMS mission investigates how the sun and Earth's magnetic fields connect and disconnect, explosively transferring energy from one to the other in a process that is important to the sun, other planets, and everywhere in the universe.

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Phys

From local action to global impact: New framework presented for advancing sustainable development‎

As countries strive to achieve the United Nations' Sustainable Development Goals (SDGs) by 2030, a new international study published in Nature Communications brings together 19 researchers in 13 institutions—including Jianguo "Jack" Liu, Rachel Carson Chair in Sustainability and director of Michigan State University's Center for Systems Integration and Sustainability (CSIS), former CSIS Ph.D student Zhenci Xu and two former CSIS visiting students Zhimeng Jiang and Xutong Wu—to present a comprehensive framework for understanding and managing cross-scale socioeconomic and environmental interconnections and feedback.

22:34
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Phys

3D method can accurately measure gravity in wide binary stars, as demonstrated by pilot study‎

Since the third Gaia data release in 2022, wide binary stars with separation greater than several thousand astronomical units have been intensely investigated across the world, to probe the nature of gravity in the low acceleration regime, weaker than about 1 nanometer per second squared.

21:21
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Phys

REGALADE: The most extensive catalog of galaxies for modern astronomy‎

An international team of scientists led by the Institute of Cosmos Sciences at the University of Barcelona (ICCUB) and the Institute of Space Studies of Catalonia (IEEC) has presented REGALADE, an unprecedented catalog covering the entire sky and bringing together nearly 80 million galaxies. The work, published in the journal Astronomy & Astrophysics, marks a turning point for astronomy and opens up a new scenario that allows researchers to explore cosmic events with a degree of precision never before achieved.

21:21
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Phys

Impact-formed glass provides evidence of cosmic collision in Brazil about 6 million years ago‎

For the first time in Brazil, researchers have identified a field of tektites. These are natural glasses formed by the high-energy impact of extraterrestrial bodies against Earth's surface. These structures, named geraisites in honor of the Brazilian state of Minas Gerais, where they were first discovered, constitute a new strewn field. This expands the incomplete record of impacts in South America.

21:21
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Phys

Small but mighty microplate reader could transform NASA research‎

A small but mighty piece of lab equipment, about the size of a cellphone, has arrived at the International Space Station after launching with NASA's SpaceX Crew-12 mission. NASA aims to use the off-the-shelf device, called a microplate reader, to conduct vital biological research in space and get real-time access to data.

21:21
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