• We do not know whether there are extra dimensions or multiverse. Let's go forward with the possible ideas that come out of the mathematics. It's hard for us to imagine a universe that would have no time at all.

    Brian Greene: We do not know whether there are extra dimensions or multiverse. Let's go forward with the possible ideas that come out of the mathematics. It's hard for us to imagine a universe that would have no time at all.
    "Professor Brian Greene answers everything you wanted to know about string theory and the multiverse". www.abc.net.au. February 26, 2016.