There’s a new book out this month, Before the Big Bang: The Origin of the Universe from the Multiverse, about which we’re told:
One of the world’s most celebrated cosmologists presents her breakthrough explanation of our origins in the multiverse.
In recent years, Laura Mersini-Houghton’s ground-breaking theory, spectacularly vindicated with observational evidence, has turned the multiverse from philosophical speculation to one of the most compelling and credible explanations of our universe’s origins.
I spent a few minutes today looking through the book in the bookstore, trying to figure out where to find the details of the “spectacularly vindicated with observational evidence.” I didn’t see any references in the book, just a claim that in 2018 the author collaborated with Eleonora Di Valentino on showing vindication by observation. Presumably this is a reference to these three papers, but who knows. I don’t see anything like that in a quick look at the papers.
For many years I’ve spent a significant amount of time reading books and papers purporting to offer scientific evidence for a multiverse, trying to carefully understand the author’s arguments and write about them here (one example involved earlier claims by this author, see here). Few physicists though seem to care that bogus claims and pseudo-science about the multiverse have overrun their field and become its public face. I’ve come to the conclusion that best to not waste more time on this.