"What was the universe like shortly before the big bang?"
> "Shortly before the Big Bang, the universe was incredibly hot and dense, with all matter and energy concentrated into a single point. This point contained all the mass and energy of the entire universe, and it was expanding at an incredibly rapid rate. This expansion created space and time, and eventually, the universe as we know it today."
"Why can't we know what the universe was like before the big bang?"
> "The Big Bang marks the beginning of the universe as we know it, so it is impossible to know what the universe was like before it. We can, however, make educated guesses based on the laws of physics and the data we have collected. For example, some theories suggest that the universe may have undergone a period of inflation before the Big Bang, which could explain why the universe is so large and homogeneous."