1/ It’s mind-blowing that we humans are able to talk about what happened in the first 3 minutes of The Big Bang.
This book was written in 1976 which was quite a while back but while there have been extensions in the ideas presented, I’m not aware of any idea being rejected yet,
2/ This should perhaps be unsurprising because most scientific ideas that are accepted as truth are consilient, i.e. they’re supported by multiple lines of evidence.