Galaxies and clusters of galaxies, untold billions of them, adorn the cosmos. How did such large-scale structure of the universe come about? The universe started as a hot...
playlist
What can we Know in a Super-Large Universe?
Watch
Our universe is incredibly huge—billions of galaxies, each with billions of stars and planets—but the entire ‘multiverse’, multiple universes, may be staggeringly more immense. It stops your breath.
