[jmcosta (OP)]

Hi,
my daughter get seek, so I need to stay at home with her, no net in the village

Thanks for you answers, in some point I agree and understand them all, some of them are to physically constructed for the physics studies in my mind.

I'm happy anyway, this will give another perspective of life.

Why can't we travel in time?  If we came from the Big Bang all existing energy is in expansion, not in contraction, am I right? Energy is going into the infinite, there is no way back, only in huge modifications in the Universe will lead it to contraction, to the point 0. We know that atoms change their energy, electrons/photons, change their orbitals according to their levels of energy, if they loose energy they go to lower orbitals, yes? When they go back to the lower orbitals, after excitement then loosing energy, it does not mean that the energy is going back, it was just modified, action reaction.

Hardcore thoughts, maybe stupids but:
the big bang generate a stream of energy, in which we are in, we all loose and win energy, but we cannot go back in time to change our actions, as an atom, it gets excited then it looses energy, there is no way back, in a supposed sense of 'time', it act and react, it can not change its reaction, like us we act/react and we cannot go back in 'time' to change our actions.
If this stream that I mentioned exists, souls, if they exist they cannot go back in time, reincarnate, once energy is going into the infinite!!?

Obviously, energy is in evolution as we are as well, we were monkeys killing mammoths and now we seat in front of the computer ... evolution, maybe

[truncated - Mod]

[spartaman64]

not sure if atoms have a definite spin but yes electrons have quantum spin of 1/2 as does protons neutrons and neutrinos and quarks i think since its positive it goes up the angular motion on its axis because quantum spin is a vector. i think that quantum "spin" is just an analogy so not sure if it actually spins

[yor_on]

I'm thinking of it slightly differently JM. My opinion is that 'time' exist. Also that it is due to 'c' and ones locally equivalent arrow we find things 'progressing', as in giving us ordered outcomes. One way to see it might be to consider the universe a projection of sorts. With the universe we observe real to us, living inside it. We, and everything we can measure, being 'natural outcomes' of those local constants and principles creating a 'commonly shared' universe, giving us distances and dimensions. But to make that work, one have to assume that what we observe is the veil, not what's behind it.