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Physics
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Physics

Earth's Magnetic Reversal Record May Be Missing Dozens of Pole Flips

Earth's magnetic poles have reversed hundreds of times over geologic history, but new statistical analysis suggests the known record is systematically incomplete. Researchers applied density analysis to the geomagnetic reversal timescale and identified specific time intervals where reversal spacing is statistically anomalous -- periods that may contain reversals never captured in the geological archive. The work has implications for understanding the dynamics of Earth's core and for interpreting current changes in the geomagnetic field.

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Physics

One Electron Beam, Two Images: Multicolor Electron Microscopy Arrives

A Harvard University team has developed multicolor electron microscopy, a technique that uses a single electron beam to simultaneously capture the detailed structural architecture of cells and the locations of specific proteins in color - at nanometer resolution. The approach exploits cathodoluminescence from standard fluorescent dyes and has been demonstrated in mammalian cells and biological tissues including fungus-infected flies. Current results are two-dimensional; 3D cryo-electron microscopy integration is the next target.

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Physics

Princeton Plasma Lab Hosts First National Meeting on Liquid Metals for Fusion Power

More than 75 researchers, engineers, and DOE officials met at Princeton Plasma Physics Laboratory in January 2026 to develop a coordinated national strategy for liquid metal technology in fusion reactors. The meeting identified infrastructure needs, science gaps, and the potential role of liquid lithium in protecting plasma-facing components - a key step toward economically competitive fusion power.

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Physics

Muscle Strength Predicts Survival in Older Women Independent of Physical Activity

Among ambulatory older women, muscular strength was independently associated with lower mortality risk in a study published in JAMA Network Open. The association held after adjusting for accelerometer-measured physical activity, sedentary behavior, walking speed, and systemic inflammation - suggesting that strength itself, not just activity level, matters for survival in older age.

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Physics

The Human Side of Particle Physics, Captured on Film

The 2025 Global Physics Photowalk drew hundreds of images from amateur and professional photographers given rare access to particle physics facilities. A photograph from Italy's INFN National Laboratories of Frascati took top prize, depicting a researcher dwarfed by a cryogenic dark matter detector operating near absolute zero.

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Physics

Coordination thermodynamic control of magnetic domain configuration evolution toward low‑frequency electromagnetic attenuation

As the rapid development of Bluetooth technology and 5G communication continues to accelerate, electromagnetic interference issues in the ISM band (2.4–2.48 GHz) for Bluetooth devices, as well as the n77 (3.3–4.2 GHz), n78 (3.3–3.8 GHz), and n79 (4.4–5.0 GHz) bands for 5G communications, have become increasingly severe. Now, researchers from Nanchang Hangkong University, Nanchang University, Jiangxi Agricultural University, and Fudan University, led by Professor Chongbo Liu, Professor Yuhui Peng, Professor Guangsheng Luo, and Professor Xuliang Nie, ...

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Physics

Continuous lower limb biomechanics prediction via prior-informed lightweight marker-GMformer

The dynamic analysis of lower limb biomechanics is crucial for understanding gait, posture, and load distribution, which are foundational for controlling assistive robots like exoskeletons and intelligent prostheses. Traditional methods, including invasive musculoskeletal measurements, while providing precise data, are costly, intrusive, and technically complex, limiting their widespread application. To overcome these limitations, noninvasive approaches, such as musculoskeletal multibody dynamics simulations (MMDS), have been proposed. These simulations combine data from noninvasive sensors like motion capture systems and force plates to ...

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Physics

Mortality among youth and young adults with autism spectrum disorder, intellectual disability, or cerebral palsy

About The Study: In this study, individuals with autism spectrum disorder, intellectual disability, or cerebral palsy experienced higher mortality from a range of causes compared with the general population in youth and young adulthood. Mortality among these groups is difficult to ascertain using death certificates alone, since ICD-10 codes for these disabilities were rarely listed. These findings can inform public health and health care strategies to understand and prevent health disparities and excess mortality associated with developmental disabilities. Corresponding ...

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Physics

When Earth’s magnetic field took its time flipping

Earth’s magnetic field is generated by the churn of its liquid nickel-iron outer core, but it is not a constant feature. Every so often, the magnetic north and south poles swap places in what are called geomagnetic reversals, and the record of these flips is preserved in rocks and sediments, including those from the ocean floor. These reversals don’t happen suddenly, but over several thousand years, where the magnetic field fades and wobbles while the two poles wander and finally settle in the opposite positions of the globe. Over the past 170 million years, the magnetic poles have reversed 540 times, with the reversal ...

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Physics

Coupling dynamic effect based on the molecular sieve regulation of Fe nanoparticles

Iron-based molecular sieves show great promise for high-temperature NH3-SCR due to their intrinsic shape selectivity and thermal stability. However, excessive ammonia oxidation at high temperatures limits NOx conversion and long-term stability, and its kinetic transition remains poorly understood. A team led by Zhiqiang Sun, Hanzi Liu, and Xinlin Xie has developed a high-temperature Fe@ZSM-5 catalyst and established a coupled kinetic model to describe ammonia oxidation behavior at high temperatures. Their work is published in the journal Industrial Chemistry & Materials on December 2025. The authors synthesized HZSM-5 zeolites via ...

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Physics

VIP-2 experiment narrows the search for exotic physics beyond the Pauli exclusion principle

The Pauli exclusion principle is a cornerstone of the Standard Model of particle physics and is essential for the structure and stability of matter. Now an international collaboration of physicists has carried out one of the most stringent experimental tests to date of this foundational rule of quantum physics and has found no evidence of its violation. Using the VIP-2 experiment, the team has set the strongest limits so far for possible violations involving electrons in atomic systems, significantly constraining a range of speculative theories beyond the Standard Model, including those that suggest electrons have internal structure, and so-called ‘Quon models.’ Their ...

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Physics

Last chance to get a hotel discount for the world’s largest physics meeting

Next month, thousands of scientists from around the world will convene to share new research results from across physics at the American Physical Society’s Global Physics Summit. The conference will be held in Denver and online everywhere March 15-20. Press registration News media with valid APS press credentials may register for the meeting at no cost. To request press credentials, visit APS’ online newsroom. Registration will remain open throughout the meeting. Housing information Discounted hotel rates are available for in-person attendees at select hotels near the Colorado ...

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Physics

Sub-shot-noise optical readout achieved in a Rydberg atomic medium

Quantum-enhanced measurement schemes promise sensitivities beyond the shot noise limit, but their practical implementation in atomic systems has long been hindered by optical loss and decoherence. In particular, squeezed states of light—one of the most accessible quantum resources—are extremely fragile when interacting with resonant atomic media, where absorption and scattering rapidly degrade their noise suppression advantage. In this work, researchers report the first realization of a Rydberg electromagnetically induced transparency (EIT) system operating in the quantum regime, where optical readout noise is reduced below the shot noise limit using a squeezed ...

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Physics

Terahertz microscope reveals the motion of superconducting electrons

Cambridge, Mass. -- You can tell a lot about a material based on the type of light you shine at it: Optical light illuminates a material’s surface, while X-rays reveal its internal structures and infrared captures a material’s radiating heat. Now, MIT physicists have used terahertz light to reveal inherent, quantum vibrations in a superconducting material, which have not been observable until now. Terahertz light is a form of energy that lies between microwaves and infrared radiation on the electromagnetic spectrum. It oscillates over a trillion times ...

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Physics

Study reveals two huge hot blobs of rock influence Earth’s magnetic field

Exploring Earth’s deep interior is a far bigger challenge than exploring the solar system. While we have travelled 25 billion km into space, the deepest we have ever gone below our feet is just over 12 km. Consequently, little is known about the conditions at the base of the mantle and the top of the core – the most significant interface in the Earth’s interior and the region where new research has now uncovered exciting magnetic activity. In a study published in Nature Geoscience, research led by the University of Liverpool ...

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Physics

Cluster radioactivity in extreme laser fields: A theoretical exploration

From Laser Breakthroughs to New Frontiers in Nuclear Decay Control With the continuous progress in experimental laser technology, significant improvements in laser energy and peak intensity have been achieved in recent years. The direct interaction between intense lasers and atomic nuclei has emerged as an exciting new possibility, one capable of altering nuclear decay lifetimes. Investigating the influence of strong laser fields on nuclear decay can elucidate how these fields affect nuclear structure ...

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