In terms of the technical understanding of our local vicinity in the universe, we’ve advanced quite a bit since ye olde times. Through constant theorising, gathering data, and more theorising, we have gradually built a more foundationally solid picture of the universe we live in. However, even now in this period of technological prosperity, there is still so much we are yet to discover and harness, so much that has yet to be explored. Only by harnessing the power of hindsight (oh, what a wonderful thing) do we look back on scientists and astronomers alike, believing that they were complete madmen for thinking the things they thought. But do we really know any better?
…which of the symmetries hold at all? The universe is a curious place and cosmologists endeavour to contain this curiosity into one theory. Or maybe two, if they’re unlucky.
If there’s anything that physicists love, it’s obeying laws.