The trio studied a particular type of stellar explosion, or supernova, and found that the most distant of these objects were receding quickest.

BBC: Dark discussion ahead for Europe and US

" He adds a bit later: "That we live in a large spiral galaxy with very little central stellar bulge and a modest central black hole may be a clue to the type of galaxies best suited to life: ones that did not spend their pasts building colossal black holes and fighting the demons unleashed in the process.

WSJ: Book Review: Gravity's Engines