Fast and furious: the gaseous outflows of quasars in the early Universe were extreme

Nature, Published online: 13 May 2026; doi:10.1038/d41586-026-01485-w

Observations from the James Webb Space Telescope reveal that extremely fast, galaxy-scale outflows from luminous objects called quasars were much more frequent, and on average more powerful, about one billion years after the Big Bang than at later cosmic epochs. These outflows could easily escape their host galaxies and regulate the evolution of early massive galaxies.