[Europan Ocean (OP)]

Particularly looking at entropy, but also space and time, matter and energy, what produces it? Since we can probe the invisible atom nucleus. What makes entropy happen, and to use an oxymoron,  before time, before the big bang, and even where it came from, what became entropy...?

If you picture the big bang as a shot from a gun, back in the barrel, and just as and before the trigger was pulled, what was there? How did it compose, and what from?

[acecharly]

Before the Big Bang nobody knows what happened or what there was if even there was anything at all as we understand it. Entropy is slowly eating away at everything though that is for sure. Nature likes to have everything in its lowest energy state and its believed by some that one day all matter will decay back to what ever there was at the start of the Big Bang. Entropy like gravity is a symptom and not a cause it happens because energy states are higher than they could be.

[yor_on]

Entropy is strange, but it should be linked to a arrow, at least as I see it. In that final state of absolute uniformity, will there still exist motion? If that is there the arrow must be too, and unless we assume a 'globally same' motion that becomes undetectable, and possibly so, no 'motion' at all. Instead assuming that relative motion should exist as space present no 'resistance/friction', also assuming it has different directions/flows?
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In fact, going from Einsteins definition of a 'SpaceTime', you will have arrow as long as you have a space.