But the most irritating book of them all, and the best example of the new pseudophysics, has nothing to do with the multiverse. It is about where our single, known universe might have come from. In his 2012 book
A Universe From Nothing: Why There Is Something Rather Than Nothing, the physicist Lawrence M. Krauss informs us that the universe came out of nothing. Sheer nothing. Nada. Zip. How does he know? Every leading theoretical physicist I have posed this question to, including the American Nobel Prize winner Steven Weinberg and the Dutch Nobel Laureate Gerard 't Hooft, have told me definitively that we have no idea where our universe came from: We can't tell what happened before, or even at, the Big Bang.
If Krauss' screed is not pseudoscience, I don't know what is. If I am going to believe him, I could just as well subscribe to the medieval "sciences" of alchemy or astrology.
Krauss gives no evidence for his carelessly cobbled-together conjecture, but he makes up for it by his aggressive tone. Studying the book carefully, I found that Krauss implies that the source of his hypothesis is a research paper by the
cosmologist Alex Vilenkin. At my request, Vilenkin sent me a copy of his article, and -- not surprisingly -- I found that what he says differs markedly from Krauss' conclusion. Vilenkin's universe does not at all start from "nothingness." It begins from a bubble of a preexisting piece of a very condensed kind of spacetime called a "
quantum foam."