jra wrote:McAz wrote:jra wrote:That's assuming the Big Bang is the 'correct' answer. There have been various other theories put forward. One problem with the Big Bang theory is 'what was there before', as essentially in simplistic terms we are talking about something coming out of nothing, which defies our current knowledge of the laws of physics.
Since 4 dimensional spacetime doesn't come into being until after the big bang there is no "before".
This is the difficult bit to get our heads around, that technically the laws of physics can change with the passage of time. And what is time anyway? Time for us as in 24 hours in the day may be different for other life forms in the universe. One other problem with 'the universe has a boundary' theory is 'what is beyond that boundary'? There are so many things we just don't know (yet).
We haven't even mastered nuclear fusion, which basically runs the Sun.
And perhaps many things we cannot know because they "exist" outside of our realm of "being",