[Retric]

Everything is physics. We break apart chemistry as it’s own subject not because there is a clean line separating protean folding etc, but rather for historical reasons. Stick a lead bar in a particle accelerator and it’s Physics stick a hand in and it’s Radiology.

Material science, Chemistry, and Astronomy really cover most of the obvious areas physics could expand into.

[lumost]

There’s a lot of relatively unexplored ground regarding macro phenomena such as fluids, and molecular dynamics, as well as a lot of open ground in alternate approaches to most common theoretical frontiers.

We’ve barely touched alternatives to tokamaks and string theory. Blending classical and quantum molecular dynamics simulations is under explored. Improving the efficiency of simulating large scale dynamical systems is under explored.

These are the areas I know offhand, I’m sure every working physicist has ideas they think are worthwhile that they seemingly don’t have time for/can’t get funding for.