This galaxy 'supercluster' lets us peek into the universe's past

An international team of astronomers has announced the discovery of an enormous and surprising structure, formed fairly early in the lifetime of the universe. This structure is a "supercluster" of galaxies, created when many galaxies are bound together by the force of gravity. Conceptually, you can imagine it as looking similar to a swarm of bees, albeit on a cosmic scale, and each bee being replaced with an entire galaxy full of hundreds of billions of stars.