A palm-sized laser from Stuttgart hits 80% efficiency, doubling current tech and redefining ultrafast optics.

Tissue-resident memory T cells that express TCF1 or ID3 exhibit stem-like properties and regulate memory heterogeneity and recall.

To make things better, first prove how good they can possibly be.

We propose and demonstrate a high-performance asymmetrical multimode interference splitter on X-cut lithium niobate on insulator (LNOI) with an ultra-compact size of 5.8 μm × (26.4–35.6) μm. A rectangle with a small region is removed from the upper left corner of the multimode interference (MMI) coupler to achieve a variable splitting ratio. Here, we design and characterize MMIs in six different distribution ratios ranging from 50:50 to 95:5 on a 600 nm thick LNOI. Based on the cascade structure, the linear fitting method accurately shows the device loss (~0.1–0.9 dB). Our fabricated devices demonstrate robustness across a 30 nm optical bandwidth (1535–1565 nm). In addition, we numerically simulate the Z-cut LNOI, showing that the structure corresponding to the TM mode can also achieve a good variable splitting ratio.

The study has resolved a long-standing cosmic puzzle and provided strong evidence for the existence of widespread magnetic fields — likely relics from the early Universe.

A 9.8-severity flaw in React Native CLI let attackers run OS commands remotely before Meta’s patch.

An exploration of the idea of miniaturizing technology and how aliens might make themselves invisible through this process.

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/ eventhorizonshow.

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A new study has unexpectedly discovered that a common parasite of modern oysters actually started infecting bivalves hundreds of millions of years before the dinosaurs went extinct.

The research, published in iScience, used high-resolution 3D scans to look inside 480-million-year-old shells from a Moroccan site known for its exceptionally well-preserved sea life. The scans revealed a series of distinctive patterns etched both on the surface of the fossils and hidden inside them.

“The marks weren’t random scratches,” said Karma Nanglu, a UC Riverside paleobiologist who led the research. “We saw seven or eight of these perfect question mark shapes on each shell fossil. That’s a pattern.”