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New info on the universe/multiverse - Tegmark

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  • shunyadragon
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    An important point here is the problem of clinging to the conclusions of one model or another concerning the nature, origins and fate of our universe, and; 'What is the nature of the Multiverse that surrounds our universe?' Our knowledge of Physics and Cosmology is evolving, and expect change and surprises concerning how future models reflect as our knowledge increases.

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  • shunyadragon
    started a topic New info on the universe/multiverse - Tegmark

    New info on the universe/multiverse - Tegmark

    New information raises many questions concerning prior assumptions on models of our universe and the multiverse.


    Source: http://www.timeslive.co.za/thetimes/2014/04/25/bye-bye-to-the-universe-hello-to-the-multiverse



    Leading physicists such as Tegmark, Brian Greene, of Columbia University, and Astronomer Royal Lord Rees are fully signed-up multiversers.

    Some evidence for the multiverse comes from observation.

    Since the Big Bang 13.8billion years ago, there has been plenty of time for space to look very different in various directions - huge clusters of galaxies in one direction, vast voids in another - but it does not.

    The best explanation is that the early universe underwent a period of unimaginably fast expansion, called inflation.

    If there was a period of rapid expansion - a faster-than-light stretching of the fabric of space-time - in the first quadrillionths of a second after the Big Bang, regions of space now tens of billions of light years apart could then have been connected.

    Last month a team of scientists announced that their telescope at the South Pole, Bicep 2, had probably discovered gravitational waves - a discovery that would not only back up our models of the Big Bang but provide strong evidence for inflation and the reality of the multiverse.

    Recent discoveries such as this suggest that space might have inflated to an infinite extent after the Big Bang. Physicists believe that the inflationary process was capable of creating matter as well as space, in similarly infinite quantities.

    In which case, go far enough and you will see an exact "repeat" of the stars and galaxies we see around us, including another planet Earth and another you - and worlds where Elvis lives, where Hitler won World War 2, and where strange creatures like unicorns graze.

    "To get rid of that conclusion," Tegmark says, "either inflation is wrong . or space is in fact not infinitely stretchy."

    Tegmark's universe of gyrating numbers, of equations coming to life, is one of bizarre possibilities and incomprehensible scale. But his most shocking argument is about the role of humans.

    Said Tegmark: "All those galaxies only became beautiful 400 years ago when someone saw them for the first time. If we humans wipe ourselves out, then the entire universe becomes a huge waste of space."

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