[moi2388]

That’s a misnomer. We know what probably causes the mass energy, it’s the cosmological constant. It only regards 68% of the energy density currently.

Same for dark matter. There are a few hypothesis, but all in all they are pretty simplistic cases.

We know the particles, the forces, there is not really “new physics” to be discovered here.

All the interactions anybody can encounter in their lives is fully understood.