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Radio telescopes confirm 3.3-million-light-year halo in unusually quiet galaxy cluster

Astronomers have employed the upgraded Giant Metrewave Radio Telescope (uGMRT) and the MeerKAT radio telescope to observe a galaxy cluster known as RXCJ0232–4420. Results of the new observations, published April 29 on the arXiv pre-print server, deliver important insights into the nature of this cluster.

Galaxy clusters contain up to thousands of galaxies bound together by gravity. They generally form as a result of mergers and grow by accreting sub-clusters. Therefore, they could serve as excellent laboratories for studying galaxy evolution and cosmology.

A protein directs neuronal migration in the embryonic brain

During brain development, neurons can regulate their movement until they reach their final destination thanks to a “molecular switch” involving the protein Teneurin 4 (Ten4). This protein can guide neuronal migration through mutually exclusive molecular pathways and determine the direction of nerve cells.

The discovery, published in the journal Nature Communications, improves our understanding of the molecular mechanisms that control neuronal migration and offers new insights into how the brain develops at the molecular level.

The study combines advanced techniques — structural protein studies, gene editing in animal models and super-resolution microscopy — to broaden our understanding of the origins of neurodevelopmental disorders and psychiatric or neurological conditions —schizophrenia, epilepsy, autism, bipolar disorder, etc. — which may be linked to errors in neuronal migration.

The maternal-fetal interface as an immunological barrier: Structure, regulation, and breakdown

The maternal-fetal interface is a specialized immunological barrier that integrates tolerance, defense, and regulated inflammation throughout gestation. Distinct immune populations mediate implantation, immune homeostasis, and parturition, while dysregulation can result in chronic placental inflammation, a consequence of barrier failure, characterized by infiltration of maternal T cells into placental/fetal tissues.

Gaussian Splatting is my new favourite thing, so I hassled an ex-Epic artist to tell me everything he knows about the low-cost ‘photo-real’ rendering technique

Open source engine PlayCanvas is what Iakov Sumygin used to build that browser-based FPS. Resources like this strengthen Schindelar’s case, particularly as the engine just introduced SplatTransform 2.0, a tool that offers “fully automated, lightning-fast generation of high-quality collision for your splats.” Without a collision mesh, players could otherwise phase through the environment, so this is yet another option that streamlines the pipeline between scan and interactive assets.

“Gaussian Splatting training—meaning the reconstruction process after capture—can reproduce real-world appearance in ways that traditional scanning methods struggle with or cannot handle properly,” He tells me, “We can now capture and represent things like hair, semi-transparency, translucency, subsurface scattering, fine foliage, and other complex visual phenomena that are extremely difficult to reconstruct as clean geometry with traditional texture workflows.”

“This direct connection between captured real-world data and a production-ready, real-time representation is what makes Gaussian Splatting so interesting,” Schindelar says, “It is not just a rendering trick—it changes the entire capture-to-delivery pipeline.”

Optogenetic mediated contractility enables reversible control of microglial morphology and migration in vivo

Biermeier et al. use live imaging in zebrafish to show that microglia alternate between distinct morphological states that support brain surveillance and phagocytosis. By optogenetically controlling cytoskeletal contractility, they demonstrate programmable, reversible control of microglial behavior in the living brain.

“Can We Survive Technology?” by John von Neumann

This is an essay written by John von Neumann in 1955, which I think is fairly described as being about global catastrophic risks from emerging technologies. It discusses a bunch of specific technologies that seemed like a big deal in 1955 — which is interesting in itself as a list of predictions; nuclear power! increased automation! weather control? — but explicitly tries to draw a general lesson.

Von Neumann is regarded as one of the greatest scientists of the 20th century, and was involved in the Manhattan project in addition to inventing zillions of other things.

I’m posting here because a) I think the essay is worth reading in its own right, and b) I find it interesting to see what the past’s intellectuals thought of issues related transformative technology, and how their perspective differs/is similar to ours. Notably, I disagree with several of the conclusions (e.g. von Neumann seems to think differential technological development is doomed).

Good vibrations for quantum communications: Engineers couple single phonon to single atomic spin

Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have demonstrated, for the first time, a single quantum of vibrational energy interacting with a single atomic spin, seeding a pathway to quantum technologies that use sound as an information carrier, instead of light or electricity. The results are published in Nature.

Led by Marko Lončar, the Tiantsai Lin Professor of Electrical Engineering, the researchers engineered a nanometer-scale mechanical resonator around a single color-center spin qubit in diamond. These color centers, atomic defects in the diamond’s crystal structure, act as quantum memory capable of storing quantum information. The researchers’ new system can host sufficiently strong spin-phonon interactions for quantum information storage—a key challenge thus far in the field.

“At the heart of the experiment is a phonon—the smallest possible unit of sound,” Lončar said. “When we listen to music, it takes countless phonons working together to move our eardrums and maybe even get us spinning on the dance floor. But qubits are far more sensitive: a single phonon can be enough to change their quantum state—to excite them, or, as in our experiment, to help them relax.”

The 20 Different Types of Faster-Than-Light (FTL) Travel In Fiction

What if humanity could travel faster than light?

In this cinematic deep dive, we explore the different types of FTL (Faster-Than-Light) travel, including warp drives, wormholes, the Alcubierre drive, hyperdrive concepts, and other theoretical methods that could one day change space exploration forever.

From bending spacetime to creating warp bubbles and bridging distant galaxies, this video breaks down the science, theory, and science-fiction inspirations behind each method — in a realistic and visually immersive way.

Whether you’re a fan of space science, futuristic technology, or sci-fi universes, this is your ultimate guide to FTL travel.

🚀 Which method do you think is the most realistic?
Comment below!

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The Hexagon and the Oracle

The threat is to the librarian. The threat is to the small, vanishing population of people who still go into the hexagons. Who still pull a book from the shelf. Who still spend three days reading it. Who still close it and feel changed. That practice is not a hobby. It is a technology. One older than print, older than the codex, possibly older than writing. It is a process of assembly inside one human skull. The kind of patient, sequential, focused and embodied attention that produces what we used to call understanding. AI does not produce that attention. AI produces a feeling that closely resembles attention while being something else, the way saccharin produces a feeling that closely resembles sweetness while being something else.

If this practice disappears, the Library will not notice. The books will not notice. The infinite hexagons will continue to extend in every direction. There will be no one in them. There will only be the queries, falling into the air, decaying into training data, generating fresh continuations for an audience that no longer reads them. Only, occasionally, glances at a summary.

This is the message Borges was telegraphing. This is what he saw, sitting in the National Library of Argentina, going slowly blind, surrounded by more books than any one man could read. He saw that the deepest threat to a literary culture was not the burning of books. It was the rendering of books unnecessary. He saw that a Library of Babel which contained every possible answer was, paradoxically, the most efficient instrument ever conceived for ending the practice of reading. And he saw, finally, that the only response available to a serious person was the response his narrator chose. To stop searching for the catalogue of catalogues. To return to one’s own hexagon. To pick up one particular book. To read it slowly. To die, eventually, a few leagues from where one was born, with one’s body falling through the fathomless air.

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