Mysteries which are not solved by theoretical physicist or which have confusing theories ? I know there are many in astrophysics but dont want to focus on them now. Is gravity explained and accepted by all ?
As far as seen, gravity is not fully explained. The chapters are yet to be opened dealing with "negative mass", "gravitational screening", "quadrupole", and so forth.
How to connect gravity theory, as in general relativity, to other theories in physics is subject to many efforts. It is a pity God is not included in your research.
A lot of things! For example, the nature of the brain and consciousness, the nature of cancer, the nature of evolution, the nature of cell division, etc. As an obvious example, I give a reference to my recent RG preprint on the physical nature of sleep.