There's something that puzzles me - a question, if you will.
Let's say there's a planet much like Earth, but twice as big. And it's full of creatures, as is the Earth, but all those creatures are twice as big as creatures on Earth. Of course they look different and all that, but they all fill ecological niches, as do critters here.
Given the things about Relativity we know to be true, time, at the surface of this planet, will pass at a different pace than it does here on Earth. The question is, what would happen if one of us, a human from Earth, was to be present on the surface of that planet?
Does our perception of time match up with the Time of the creatures that live on this planet? Or does the Earthman's time run "faster" than that of the larger planet's creatures? Do they, then, seem to move and react in "slow motion" compared to our Earthman?
Is there "time" at the quantum level? At the atomic level? Is that "time" constant at all locations - the same here on Earth (at those levels) as on that larger planet? Or does the context of the quantum, and of the atomic, dictate the passage of time (if time does exist at those levels)?