The Deepening Mystery Around the JWST's Early Galaxies

When the JWST came to life and began observations, one of its first jobs was to gaze back in time at the early Universe. The Assembly of Galaxies is one of the space telescope's four main science themes, and when it observed the Universe's first galaxies, it uncovered a mystery. According to our understanding of how galaxies evolve, some were far more massive than they should be.