The James Webb Space Telescope discovered a population of 'little red dots' (LRDs) — compact objects with disproportionately massive black holes that almost disappear at z<3. A study of 98 such sources showed that at z>4 they reside in sparse regions, but by z~3.5 their environment and dark halo mas
arXiv:2606.02773v1 · 2026-06-01