Quasar discovery sheds light on early universe's rapid growth - Astronomers explore the properties of an obscured hyperluminous quasar - How black-hole-powered quasars killed off neighboring galaxies in the early universe - Observations confirm that early-universe quasar neighborhoods are densely populated with companion galaxies - Quasars are 'cosmic signposts' pointing to rare supermassive black hole pairs - A black hole of inexplicable mass: JWST observations reveal a mature quasar at cosmic dawn - The earliest merging quasars ever seen - Astronomers discover merging twin quasars - Astronomers observe elusive stellar light surrounding ancient quasars - MIT astronomers observe elusive stellar light surrounding ancient quasars