Not especially spatial

A tachyon indicates an instability
Symmetries provide an extra rule
The Weakbrane is expected to be lighter
The scale used to measure energy must be rescaled
Not all dimensions are created equal
Additional particles can arise independently of strings
Several theoretical pioneers never completely converted
Different frequencies do not contribute democratically
The minimum energy of a quantum would be too large
The Higgs particle is overly large
Generally, we can ignore gravity
An eleven-dimensional theory with a rolled-up dimension acts like a ten-dimensional theory
Ordinary uncharged strings don’t pair with objects
Altering the Standard Model so dramatically poses formidable challenges
Their idea was elegant, and turned out to be of more general validity than anyone realized at the time

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