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Daily Science to all
22 сент., 04:53
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In principle, once cameras everywhere capture enough high-resolution, overlapping views, ordinary photographs may start to feel obsolete.Instead of saving a single flat image, those recordings could be used to reconstruct a navigable 3D representation of a scene — estimating the position, shape, depth, texture, and appearance of objects from multiple camera angles.You could then return to a particular moment, move the virtual camera to almost any viewpoint, and generate a new image from that angle. Parts of the scene that were never directly visible to any camera wouldn’t be true recordings — AI would have to infer and reconstruct them from the surrounding visual information.Author: joergkahlhoefer#gaussian #splat #3DDaily Science to all
21 сент., 09:49
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⚛️ Scientists Found Quantum Entanglement Inside Higgs Boson DecaysEinstein famously disliked quantum entanglement enough to call it “spooky action at a distance.”Now physicists have found strong evidence that the same bizarre quantum connection survives inside some of the most violent particle collisions humans can create.Using the ATLAS Experiment detector at the Large Hadron Collider, researchers studied Higgs bosons decaying into pairs of Z bosons — massive particles that exist for only a tiny fraction of a second.The question was simple:Are the quantum states of those two particles independent — or entangled?The Z bosons disappear far too quickly to measure directly. Instead, researchers reconstructed their spin states from the directions of the electrons and muons produced when they decayed.The resulting correlations strongly favored quantum entanglement. APhysical Review LettersMeasurements of $Z$-Boson Pair Entanglement in Decays of Higgs Bosons at the ATLAS ExperimentFirst measurements of quantum entanglement between two massive vector bosons at the electroweak scale link quantum information concepts with precision measurements.Daily Science to all
20 сент., 08:57
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🧠 Scientists Replaced Most of a Mouse’s Cortex With Human Brain TissueThis sounds like science fiction, but the experiment is real.Stanford researchers genetically engineered mice so that most of their cerebral cortex and hippocampus never developed. The adult animals were left with only about 2% of the normal amount of corresponding cortical tissue.Then, shortly after birth, scientists implanted tiny human cortical organoids — brain-like structures grown from human stem cells — into the empty space.Three months later, more than 90% of the cortical tissue by volume was human-derived.And it did not simply sit there.Human neurons became integrated into the mouse nervous system, developed organized electrical activity and sent long-range projections — some extending as far as the spinal cord. The mice retained broadly normal movement, although researchers found specificNatureDevelopmental xenocortication using human-derived organoids in miceNature - Xenocortication with human neurons enables circuit- and behaviour-level analysis of neurodevelopment in mice.Daily Science to all
20 сент., 07:49
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🧠 Scientists Replaced Most of a Mouse’s Cortex With Human Brain TissueThis sounds like science fiction, but the experiment is real.Stanford researchers genetically engineered mice so that most of their cerebral cortex and hippocampus never developed. The adult animals were left with only about 2% of the normal amount of corresponding cortical tissue.Then, shortly after birth, scientists implanted tiny human cortical organoids — brain-like structures grown from human stem cells — into the empty space.Three months later, more than 90% of the cortical tissue by volume was human-derived.And it did not simply sit there.Human neurons became integrated into the mouse nervous system, developed organized electrical activity and sent long-range projections — some extending as far as the spinal cord. The mice retained broadly normal movement, although researchers found specificNatureDevelopmental xenocortication using human-derived organoids in miceNature - Xenocortication with human neurons enables circuit- and behaviour-level analysis of neurodevelopment in mice.Daily Science to all
14 сент., 11:56
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The brain of a dead male fruit fly was connected to a ROBOT — giving the fly a new body and allowing it to move freely through our world again.The fly’s neural activity is translated into commands for motors that control the robot’s legs.So, in a sense, the fly is… alive again.“Black Mirror” was a documentary.@scienceDaily Science to all
8 сент., 12:18
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🧬 Life Uses 4 DNA Letters. Scientists Just Made 8 Work.Every known organism on Earth writes its genetic instructions using the same four DNA letters: A, T, C and G.Scientists have now shown that one of biology’s most fundamental molecular machines can read an alphabet containing eight.Researchers tested E. coli RNA polymerase — the enzyme that reads DNA and turns its information into RNA — with synthetic DNA containing four additional chemical letters known as P, Z, B and S. Remarkably, the enzyme successfully recognized and transcribed the artificial base pairs using much of the same molecular machinery it employs for natural DNA.Using cryo-electron microscopy at resolutions down to about 2.4 ångströms, the team could watch how the synthetic letters fit inside the polymerase. The artificial pairs adopted almost the same geometry as ordinary Watson–Crick DNA pairs, allowing theNatureStructural basis of transcription of the hachimoji eight-letter alphabet by E. coli RNA polymeraseNature Communications - Expanded genetic alphabets can increase the functional diversity of nucleic acids, but their compatibility with cellular transcription is uncertain. Here, the authors show...Daily Science to all
5 сент., 16:21
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🌍 The US Was the Only Country to Vote Against the UN's New World MapOn Friday, the UN voted to adopt the Equal Earth map projection. 164 member states voted in favour of the resolution to change the map, 6 abstained — and only the United States voted against.⚡️ The breakthrough in a nutshell: The Equal Earth projection aims to "provide a fair representation of the real sizes of the world's regions, in particular Africa."🔬 Key findings: • The world — including Google Maps — still mostly uses the Mercator projection, created in 1569. • Mercator is great for navigation: north–south lines keep constant true bearings relative to the equator. But it distorts country sizes: regions farther from the equator look disproportionately bigger than those closer to it. • On a Mercator map, Greenland looks about the size of Africa. In reality, Africa is roughly 14 times larger than Greenland.
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4 сент., 11:05
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3 сент., 17:14
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29 авг., 15:54
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Daily Science to all
29 авг., 15:53
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28 авг., 08:43
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Daily Science to all
23 авг., 07:48
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🧠 Singapore Just Opened a Data Center Powered by Living Human NeuronsThis sounds like science fiction, but it went live on July 16.Australian startup Cortical Labs, together with the National University of Singapore and data-center operator DayOne, has launched a biological computing facility where part of the processing is performed not by GPUs — but by living human neurons grown in a lab.Inside are 20 CL1 biological computers. Each contains at least 200,000 neurons grown on a silicon chip covered with electrodes. The neurons originate from human blood cells that are reprogrammed into stem cells and then differentiated into neurons.And yes, the computers have to be fed.Every three days, technicians supply the cells with sugar, micronutrients and pH buffers, while a life-support system regulates oxygen, nitrogen and CO₂.The strange part is that these neurons can actuallyThe Straits TimesForget silicon chip servers, Singapore’s newest data centre needs to be fedSingapore’s first biological data centre uses lab-grown brain cells for energy-efficient computing, ideal for robotics and cybersecurity with limited data needs. Read more at straitstimes.com. Read more at straitstimes.com.Daily Science to all
21 авг., 08:06
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🧬 A Personalized mRNA Cancer Vaccine Has Passed Its Biggest Test YetFor the first time, a personalized mRNA cancer therapy has succeeded in a Phase 3 clinical trial — the final major testing stage before regulators can consider approval.The treatment, called intismeran autogene, is not an off-the-shelf vaccine. Doctors sequence each patient’s tumour, identify mutations unique to their cancer, and manufacture an individual mRNA therapy encoding up to 34 of those tumour-specific targets. The goal is essentially to give the immune system a personalized wanted poster for the cancer.In the trial, 1,137 people with stage IIB–IV melanoma whose tumours had been completely removed received either the personalized mRNA therapy plus the immunotherapy drug pembrolizumab (Keytruda), or pembrolizumab alone. The combination produced statistically significant and clinically meaningfulDaily Science to all
19 авг., 09:26
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🌌 Scientists May Have Seen “Empty” Space Bend LightAlmost 90 years ago, quantum theory made a bizarre prediction: a perfect vacuum is not truly empty. Under an unimaginably strong magnetic field, empty space itself should behave a little like a transparent material — changing the way light passes through it.Now astronomers may finally have seen the effect in nature.Researchers studied 1E 1547.0−5408, a magnetar — an ultra-dense neutron star with a surface magnetic field above 100 trillion gauss. Using NASA’s IXPE X-ray telescope together with NICER and Australia’s Parkes/Murriyang radio telescope, the team measured extraordinarily polarized X-rays: about 65% at 2 keV, rising to nearly 80% during parts of the star’s rotation.Ordinary models struggled to reproduce what they saw. But when the researchers included vacuum birefringence — a prediction of quantum electrodynamics inNatureVacuum birefringence and the polarized X-ray emission from a radio magnetarNature - Polarization measurements of the magnetar 1E 1547.0−5408 provide strong evidence that vacuum birefringence shapes X-ray propagation, offering an important observational test of...Daily Science to all
17 авг., 11:09
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🪱 Animals Have Been Eating Nature’s “Bioplastic” for Millions of YearsLong before humans invented biodegradable plastics, bacteria were already making their own.Many microorganisms produce compounds called polyhydroxyalkanoates, or PHAs — natural polyester-like materials that they store inside their cells as reserves of carbon and energy. Scientists had long assumed that breaking down these microbial plastics was essentially a job for microorganisms themselves.Then researchers studied a very strange animal: Olavius algarvensis, a tiny marine worm with no mouth and no gut. It survives by hosting bacteria beneath its skin and digesting them for nutrition. Some of those bacteria store as much as 42% of their cellular carbon in PHA.The researchers discovered that the worm produces its own enzyme capable of breaking PHA into smaller molecules it can use. And it is not alone. RelatedNatureAnimal degradation of microbial storage polyhydroxyalkanoatesNature Ecology & Evolution - This study shows that the degradation of microbial storage polyhydroxyalkanoates is not just restricted to microorganisms by finding that some animals also have the...Daily Science to all
12 авг., 14:12
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👁️ Scientists Have Mapped the Wiring Behind Human High-Resolution VisionResearchers have created the first complete cell-by-cell and synapse-level wiring map of the human fovea — the pinhead-sized region of the retina that lets us read, recognize faces and see fine detail in color.The team reconstructed roughly 3,000 neurons and more than 300,000 connections, tracing how signals move through this tiny patch of nervous tissue. What they found was unexpectedly elegant: while much of the retina uses many overlapping pathways, the human fovea funnels visual information through just three major circuits.That streamlined architecture may be one reason human central vision is so precise. The researchers describe it as more like an expressway than a maze of side streets — sacrificing redundancy for speed and efficiency.The fovea is technically part of the central nervous system, whichPNASApproaching a connectome of the human foveal retinaThe foveal retina is a unique primate specialization and a promising target for the first connectome of a human central nervous system structure. I...Daily Science to all
11 авг., 06:17
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🔴 A Rock From Mars Just Filled a 2-Billion-Year Hole in the Planet’s HistoryScientists have dated an unusual Martian meteorite to 1.273 billion years old — placing it almost exactly inside a huge missing chapter in our geological record of Mars.The meteorite, called NWA 13441, was discovered in Algeria in 2019. Most Martian volcanic meteorites of its type are either younger than about 600 million years or around 2.4 billion years old. Until now, researchers had essentially no samples from the enormous interval between them.But its age may not even be the strangest part. The rock’s neodymium isotopes suggest that the magma it formed from came from a portion of the Martian mantle that had remained remarkably untouched since the earliest days of the Solar System. Mars formed very quickly and, unlike Earth, has no active plate tectonics constantly remixing its interior — potentiallyDaily Science to all
9 авг., 18:41
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🛰 We May Be Building Satellite Constellations Too Large for Earth’s OrbitA new analysis suggests that some satellite megaconstellations could cross a dangerous threshold where collisions create debris faster than Earth’s atmosphere can remove it — potentially triggering a runaway increase in space junk.The study introduces the idea of a “critical size” for a satellite constellation. Above that point, even if individual satellites follow good disposal practices and actively avoid collisions, the constellation as a whole may still generate an unstable debris environment. The model found that several planned, partially deployed and existing constellations exceed that threshold under some assumptions.The scale of what is being proposed is enormous. The paper notes that the number of active satellites in low-Earth orbit increased by nearly 12,000 in just five years, while applicationsarXiv.orgCritical Sizes of Satellite ConstellationsThe precipitous growth of commercial space activity, largely from the development of satellite constellations, threatens to produce a runaway orbital debris population. National regulators are...Daily Science to all
30 июл., 12:51
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📡 6G May Be Able to Detect People Through Walls — And Privacy Experts Are AlarmedThe next generation of mobile networks won’t just transmit data. Under development for the 2030s, 6G is expected to integrate Integrated Sensing and Communication (ISAC) — a technology that combines wireless communications with radar-like sensing.According to Germany’s Data Protection Conference (Datenschutzkonferenz), ISAC could allow networks to detect people through walls and remotely measure breathing and heart rate. Combined with machine learning, the system may also identify individuals by analyzing their gait, gestures, posture, and even facial movements.The privacy concern is obvious: anyone within the network’s coverage could potentially be sensed, making meaningful user consent nearly impossible.Researchers at the Barkhausen Institut in Dresden are already working on countermeasures.www.datenschutzkonferenz-online.deDer offizielle Webauftritt der Datenschutzkonferenz (DSK), dem Gremium der deutschen Datenschutzaufsichtsbehörden1,120Открыть в Telegram
