  String tension fundamentally determines the properties of strings; yet its
value is often assigned arbitrarily, creating a fine-tuning problem. We
describe a mechanism for dynamically generating string tension in a flat or
almost flat spacetime, using the modified measures formalism, which in turn
naturally generates a new type of stringy brane-world scenario. Such a scenario
allows strings to achieve near infinite tension confining the strings to two
very close expanding surfaces, but the infinite tensions also threatens to
distort the near-flat embedding spacetime through large back reactions. We
argue that this danger can be neutralised via the creation of a baby universe,
a growing region of emdedding spacetime that divorces from the ambient
embedding spacetime, while our universe is still a brane separating two nearly
flat spacetimes. The avoidance of a minimum length and a maximum Hagedorn
temperature in the context of dynamical string tension generation are also
discussed.
