*** AntiGravity Propulsion ***
A Faster Stairway to the Stars
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Physics' Greatest Puzzles
Puzzle #5
#5. Why does the Universe appear to have one time and three space dimensions?
'Just Because' is not considered an acceptable answer. And just because
people can't imagine moving in extra directions, beyond up-and-down,
left-and-right, and back-and-forth, doesn't mean that the Universe
had to be designed that way.
According to superstring theory, in fact, there must be six more spatial
dimensions, each one curled up too tiny to detect. If the theory
is right, then why did only three of them unfurl, leaving us with this
comparatively claustrophobic dominion?
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