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**These are excerpts and elaborations from my book "The Nature of Consciousness"**

The problem with
superstring theory is that, quite simply, there are too many superstring
theories (at least five), each of them perfectly valid. Edward Witten noted that a few of them were simply the same theory viewed from
different angles, and proposed the M-theory, the theory of all possible
superstring theories ("Heterotic and type I string dynamics from eleven
dimensions", 1995). It turns out that M-theory can also be viewed as an
eleven-dimensional theory of ten-dimensional theories. M-theory does
not constrain the universe to be the one we observe: a staggering 1 to the 500 Back to the beginning of the chapter "The New Physics" | Back to the index of all chapters |