(1) The universe didn't stay tiny because the little ball that contained all of substances conuldn't continue to contain all of it. So it exploded because of the amount of pressure that was contained in the little ball.
(2) I think that it would be kind of scary and that we would die instantly.It would prbably be too strong for the human body to take (male or female). But then at the same time of being scary, in those little minutes that we would have to live it would be extremely exciting and impressive. Because there would it would be like a completly differet world compared to Earth, including disadvantages (such as death) and advantages (such as adventure).
(3) I think that if worm holes were proven to actually exist that it would amazing. I think it would travel to a different time but to the same place. Like, if i went through a worm hole i would still be in Fayetteville, North Carolina, but it would be in 2043 or something.