20. Time Wasn’t Around Forever
If you think time is immutable and has always been around, that might not be the case. Many scientists are of the opinion that time did not even exist until the Big Bang.
According to this theory, time was created along with the Big Bang, just like every other matter in the universe was. Since we can’t still figure out what happened or existed (or didn’t exist) before the Big Bang, we might never be able to completely accept or refute this idea.