The mere fact that we live in a universe boggles my mind every once in a while. But thankfully, our cosmic home is a place that follows rules; the laws of physics seem to agree everywhere, and galaxies are uniformly distributed throughout. Except for in this 300-million-light-year-long region, which seems to be missing something.
Scientists observed an opaque region of space in front of a quasar, an extra bright source of light, in the far distance. They realized that, confusingly, this light-blocking region had fewer galaxies than they expected.