During March and April 1959, at Wheeler's request, Everett visited Copenhagen, on vacation with his wife and baby daughter, in order to meet with Niels Bohr, the "father of the Copenhagen interpretation of quantum mechanics". The visit was a complete disaster; Everett was unable to communicate the main idea that the universe is describable, in theory, by an objectively existing universal wave function (which does not "collapse"); this was simply heresy to Bohr and the others at Copenhagen. The conceptual gulf between their positions was too wide to allow any meeting of minds; Léon Rosenfeld, one of Bohr's devotees, talking about Everett's visit, described Everett as being "undescribably stupid and could not understand the simplest things in quantum mechanics". Everett later described this experience as "hell...doomed from the beginning".[13]
Everett's obesity, frequent chain-smoking and alcohol drinking[7] almost certainly contributed to this, although he seemed healthy at the time. A committed atheist,[5] he had asked that his remains be disposed with the trash after his death. His wife kept his ashes in an urn for a few years, before complying with his wishes.[5] About Hugh's death his son, Mark Oliver Everett, later said:
I think about how angry I was that my dad didn't take better care of himself. How he never went to a doctor, let himself become grossly overweight, smoked three packs a day, drank like a fish and never exercised. But then I think about how his colleague mentioned that, days before dying, my dad had said he lived a good life and that he was satisfied. I realize that there is a certain value in my father's way of life. He ate, smoked and drank as he pleased, and one day he just suddenly and quickly died. Given some of the other choices I'd witnessed, it turns out that enjoying yourself and then dying quickly is not such a hard way to go.[17]
Everett's daughter, Elizabeth, suffered from manic depression and committed suicide in 1996 (saying in her suicide note that wished her ashes to be thrown out with the garbage so that she might "end up in the correct parallel universe to meet up w[ith] Daddy"),[5] and in 1998, his wife, Nancy, died of cancer. Everett's son, Mark Oliver Everett, who found Everett dead, is also known as "E" and is the main singer and songwriter for the band Eels. The Eels album Electro-Shock Blues, which was written during this time period, is representative of these deaths. Mark explored his father's work in the hour-long BBC television documentary Parallel Worlds, Parallel Lives.[18][19][20][21] The program was edited and shown on the Public Broadcasting Service's Nova series in the USA during October 2008.
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The authors explain, in a manner consistent with M-theory, that as the Earth is only one of several planets in our solar system, and as our Milky Way galaxy is only one of many galaxies, the same may apply to our universe itself: that is, our universe may be one of a huge number of universes.[11]
The book concludes with the statement that only some universes of the multiple universes (or multiverse) support life forms. We, of course, are located in one of those universes. The laws of nature that are required for life forms to exist appear in some universes by pure chance, Hawking and Mlodinow explain