answ2 No one knows other than our present grasp of physics is insufficient to answer the Question.
It is tempting to say that the Big Bang was preceded by a sense of anticipation - but that is tautology.
But it is good fun trying to find the right questions.
what do scientist assume about the universe???
Do you have a specific scientist in mind??
Issac Newton
no scientific equipment can go out of this universe because the scientist won't get feedback and astronaut can't go out of the universe because the astronauts well get stuck.
it is the oscillating model
Cosmologist
cosmologists
A scientist to mysteries of the universe.
A panentheist is a person who believes in panentheism - the doctrine that the universe subsists within God, but that God nevertheless transcends or has some existence separate from the universe.
Ptolemy believes that the earth is the center of the universe.
Albert Einstein
ptolemy