There's really little else to add to what Ted says. Our, and other PMRs, are all 'set off' (digital big bang) with a governing rule-set, and left to evolve from then on. The physical form of the PMR, as well as of any 'critters' that evolve within it, are virtual, and exist only as probability data until collapsed by a conscious observation. The complexity, or otherwise, of the sentient critters which arise/evolve within the rule-set, will determine their 'decision-space' and interactivity, and hence their ability to further the evolution of consciousness (the purpose of the PMR). That dinosaurs, and other critters, will leave 'physical' (virtual) remains - such as fossils - is all determined by the probability in accordance with history and the rule-set. The probabilty wave is collapsed into (virtual) actuality by conscious observation, such as when a paleontologist discovers a fossil in a certain place. The dinosaur (or other critter) which became the fossil certainly did exist as a virtual being in the PMR past, thus giving rise to the probability of its remains forming a fossil (again, within the rule-set).
As Ted regularly emphasises, there is nothing "out there", except data, which includes probability functions (data). Even we IUOCs are just data - self-aware, self-modifying data, within Consciousness Space (where "Space" is not the same as PMR Space).
Don't know if this helps you at all!
"Life is what happens to you while you're busy making other plans."