• Physicists Think They've Spotted the Ghosts of Black Holes from Another

    From Internetado@21:1/5 to All on Thu Aug 30 00:28:02 2018
    We're not living in the first universe. There were other universes,
    full of black holes, in other eons before ours, a group of physicists
    has said. And we can detect traces of those long-dead black holes in


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    [[Mod. note -- The technical paper behind this article is
    Daniel An, Krzysztof A. Meissner, & Roger Penrose
    "Apparent evidence for Hawking points in the CMB Sky"
    The authors claim that there are circular rings on the sky in which
    the CMB has relatively low variance, and that this is just what their "conformal cyclic cosmology" predicts.

    The space.com article notes that a previous similar proposal by
    Gurzadyan & Penrose (https://arxiv.org/abs/1011.3706) attracted strong criticism, with Wehus & Eriksen (https://arxiv.org/abs/1012.1268) and
    and Moss, Scott, & Zibin (https://arxiv.org/abs/1012.1305) arguing
    that that the frequency of occurence of the low-variance rings was
    no more than would be expected from random Gaussian noise with the
    known CMB angular power spectrum.
    -- jt]]

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