Cosmic web mapped at infancy

Using deep infrared imaging and distance measures from the James Webb Space Telescope, researchers have produced the most detailed map yet of the cosmic web — the dark‑matter filaments and sheets — as they existed a few hundred million years after the Big Bang. The map resolves structures and substructures previously blurred together, offering direct empirical constraints for models of early galaxy formation and dark‑matter clustering. — The dataset reframes debates about how quickly large‑scale structure and galaxies assembled, affecting theoretical cosmology, telescope priorities, and public science literacy about the early universe.