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כתבות אחרונות מאתר 'Phys'
Phys

Advanced optical imaging reveals hidden activity in blood immune cells‎

A routine blood sample contains a diverse collection of immune cells that can reveal important clues about health and disease. These cells, known as peripheral blood mononuclear cells (PBMCs), are widely used to study infections, autoimmune disorders, cancer and the immune system's response to treatment. Scientists typically identify these cells using fluorescent labels that attach to specific surface markers. While effective, those methods provide limited information about how the cells are functioning and can alter the cells during preparation. As reported in Biophotonics Discovery, a recent study shows how advanced optical imaging can reveal a previously inaccessible layer of information: the metabolic activity of individual immune cells within a complex blood sample.

00:44
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Phys

How bird movements are helping researchers track a global virus‎

While the highly virulent avian influenza strain has only recently been discovered on Australian shores, researchers at Deakin University have been working behind the scenes for years, anticipating what an outbreak might look like.

00:13
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Phys

Small molecular substitutions reshape energy pathways behind aggregation-induced emission‎

Certain chemical substances, broadly called luminogens, have an inherent ability to emit light. Most fluorescent molecules emit light in solution but lose their emission in the solid state, where the molecules aggregate.

21:40
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Phys

Six unusual structures identified at Earth's core-mantle boundary with the help of deep learning‎

Since scientists can't drill 2,900 km (1,800 miles) to the boundary between Earth's core and deep mantle, they must use information relayed by seismic waves recorded during earthquakes to study this region. In a new study published in the journal JGR Solid Earth, a group of scientists used deep learning to study a large set of a specific type of seismic wave. The analysis revealed six continuous bands of irregularities at the core-mantle boundary (CMB) that had previously appeared only as sparse patches.

20:16
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Phys

The extinct American 'cheetah' was not a cheetah after all‎

With their slender bodies and long front legs, Miracinonyx trumani—often nicknamed the "American cheetah"—was long thought to be a North American analog of the African big cat. But in a new study published in the journal Current Biology, researchers reveal that the extinct cat was more closely related to pumas. Some populations living near the Arctic preyed almost exclusively on fish, challenging the long-held assumption that these "cheetahs" chased fast-running prey, such as pronghorns.

18:14
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Phys

Extreme pressure turns blue pigment into record-long single-atom copper chains‎

As the electronics in our technology keep shrinking, traditional silicon-based chips are approaching their fundamental physical limits. Yet the wires connecting them might be able to shrink beyond conventional dimensions, as scientists have created one of the longest single-atom copper chains to date that could serve as molecular wires.

17:32
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Phys

How algorithms are making our environments bland‎

The Pantone color of the year for 2026 is white. It's called Cloud Dancer, which is described as a "lofty white." This choice reflects a growing trend away from color in our visual world.

16:04
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Phys

'Quiet' pulsar suddenly reveals three glitches in 15 years of observations‎

Using more than 15 years of observations from the Parkes radio telescope, astronomers detected three rotational glitches in the pulsar PSR J1637−4642—a young neutron star that had shown no signs of glitches since its discovery. The three glitches included one that changed its rotation rate by nearly 3 parts per million. Their paper was posted to the arXiv preprint server on Aug. 20. It has been accepted for publication in the Astrophysical Journal Letters.

16:04
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