Where are the smallest galaxies? A recent study suggests that there may not be as nearly as many of them in the early universe as there should be, which has big implications for the story of how our universe grew up.
For years, astronomers have looked back into the deep history of the cosmos and assumed that if they just looked hard enough, they would find a nearly infinite supply of tiny, dim galaxies huddling in the darkness. They figured that, the smaller the galaxy, the more of them there should be.
