Scientists solve problems; that’s their job. But which problems are promising topics of research? This is the question I set out to answer in Lost in Math at least concerning the foundations of physics. A first, rough, classification of research problems can be made using Thomas Kuhn’s cycle of scientific theories. Kuhn’s cycle consists of a phase of “normal science” followed by “crisis” leading to a paradigm change, after which a new phase of “normal science” begins. This grossly oversimplifies reality, but it will be good enough for what follows.
A nice little article on a question many of us should be asking ourselves more often. This one has some additional nice overview of bits of physics in addition, but circling back around to the original question is always very valuable.
I’m going to have to track down a copy of Sabine Hossenfelder’s book Lost in Math: How Beauty Leads Physics Astray.