That's all very well, but if the current understanding of the Big Bang is correct, then it is impossible to find out. The difference between that and GR i swe can find if GR is wrong or not.
The big bang could have been triggered by a giant pink teddy bear for all we know, and can possibly know.
No it isn't, all you have to do (assuming there's no other matter in the universe and no resistive forces) is give it the same KE as current GPE and watch it fly away forever.
You're unique among the rest of humans if you descended from the neanderthals.
And lets look at chess.
Lots of gradual, very small changes that result in drastic ones over a period of time.
The machine is a demonstration of standing waves.
The definition of species vary, but the usual one is the point at which they can no longer interbreed, which is a very defined point and can happen even between groups that coexist.
In addition, neanderthals are not our ancestors.
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