I accept that there is human interpretation and perspective, but geology and astronomy prove a long history of the this planet and much more beyond that existed long before humanity. We don't discover things into existence.
That isn’t the argument. The argument is that the past, present and future all exist — are on equal ontological footing. The aforementioned Petkov has taken great pains to argue (demonstrate?) that this is the explanation of the phenomenon of length contraction alone. The rod could not be length contracted, he purports to show, unless it existed in all its stages — past, present, and future. From this it follows that nothing actually moves or changes — the rod, you, me, everything, exist timelessly in 4D, world tubes whose boundary conditions, for humans, are birth and death.
Socrates, for example, exists — it is just that, from the perspective of the present, he is temporally distant from us — in this case, “earlier than,” from our point of view. “Later than” stuff also exists relative to us, only those things, too, are temporally distant, ever farther away in the farther future. This means that what we conventionally label “the present” is an indexical.
As to the mind, I challenge anyone to describe a mind-independent rose. Surely it is obvious that a rose’s color, sensation, shape, odor, and all other properties you could ascribe to it are in the mind? A rose is nothing but a collection of qualia. If you were to argue that the real rose is a collection of atoms, for quantum fields, or whatever, I’d say those things are also mental constructs. This is called metaphysical idealism, in contrast to metaphysical naturalism.