Given how unfathomably large the universe is, it is perhaps understandable that we haven’t yet cracked all its secrets. But there are actually some pretty basic features, ones we used to think we could explain, that cosmologists are increasingly struggling to make sense of.
Recent measurements of the distribution of matter in the universe (so-called large-scale structure) appear to be in conflict with the predictions of the standard model of cosmology, our best understanding of how the universe works.
