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. Some of them appear to have supermassive black holes (SMBH) in their centers that are fueling active galactic nuclei (AGN). However, they’re not emitting X-rays, which is one of the hallmarks of AGN.