A new, epic voyage through all known scales of reality charts the outer limits of existence, from the edge of the observable universe to the subatomic realm (scientificamerican.com)
Despite the apparent divide between researchers as to whether FRBs are immensely energetic one - time events from the edges of the observable universe or smaller, repeating ones from much closer by, there is plenty of room in the cosmos for both phenomena to coexist. (scientificamerican.com)
But the realization that quasars were really out at the edge of the observable universe, and thus must be far brighter than the brightest galaxy, posed a riddle that nobody has yet been able to answer with certainty: What are they? (discovermagazine.com)