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Physics
From particles to cosmology—laws of nature, matter, energy, and motion.
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Latest in Physics
Known physics suggests the early universe should have produced matter and antimatter in equal amounts. Nearly all of it annihilated into radiation, but roughly one extra matter particle survived for every billion pairs—and why that tiny imbalance existed remains one of physics’ deepest unsolved problems.
2+ hour, 20+ min ago (906+ words) The measured net baryon-to-photon ratio is about 6.1 parts in ten billion. Physics can describe the required ingredients for that excess, but no confirmed mechanism made it....
A New Catalog of Close to 3,000 Supernova Challenges Theories on Dark Energy
2+ hour, 57+ min ago (88+ words) The most comprehensive catalogue of exploding white dwarf stars ever assembled has revealed new clues about dark energy, the mysterious force driving the universe’s accelerating expansion....
The Universe Changed Its Mind About Expansion
11+ min ago (29+ words) For billions of years, expansion slowed. Then something changed. About six billion years ago, the Universe crossed a strange cosmic threshold. Nothing …...
A Century-Old Physics Effect Just Got a New Dimension
6+ hour, 18+ min ago (417+ words) Physicists have uncovered an in-plane Hall response that overturns a century-old assumption about how this famous electrical effect works. The discovery could eventually make multidirectional magnetic sensing possible with one tiny device....
Scientists Detect a Mysterious Signal That Could Be Dark Matter
14+ hour, 28+ min ago (509+ words) A mysterious signal deep underground may offer LUX-ZEPLIN its most intriguing clue to dark matter yet. For nearly a century, scientists have been trying to identify dark matter, the mysterious material believed to account for about 85% of all matter in…...
Atomic Swap in Two-Dimensional Nitrides Unlocks Five New Water-Splitting
3+ hour, 22+ min ago (506+ words) A single-atom substitution could transform one of the most exciting families of two-dimensional materials from a laboratory curiosity into a working engine for solar fuels....
U.S. Begins Yearlong Directed Energy Counter-Drone Trials Across Five Military Bases.
2+ day, 23+ hour ago (702+ words) The Pentagon has moved directed-energy counter-drone systems into yearlong operational trials at U.S. military bases to assess their readiness for routine installation defense. The effort will... U.S. Begins Yearlong Directed Energy Counter-Drone Trials Across Five Military Bases. The Pentagon has moved directed-energy…...
MemBrain v2 Brings End-to-End Membrane Analysis to Cryo-Electron Tomography
4+ hour, 11+ min ago (880+ words) Cryо-electron tomography has quietly become one of the most powerful windows into the interior of cells, allowing researchers to peer at the molecular machinery of life in a state close to its native, frozen-hydrated condition....
Strained Silicon Quantum Dots Reveal New Design Rules for Intermediate-Band
4+ hour, 11+ min ago (625+ words) Silicon has long dominated the solar industry, but its fundamental physics imposes hard limits on how much sunlight a single-junction cell can convert into electricity. Photons with less energy than silicon’s band gap simply pass through the material, while photons…...