BOOK REVIEW | Warped Passages
October 24, 2005
Source: New York Times
Randall argues that without any experimental feedback, string theorists may never reach their goal. She prefers a different strategy, called model building. Rather than seeking to create an all-encompassing theory, she develops models — mini-theories that target specific testable problems and that might then point the way to a more general theory.
For example, what if, they ask, higher dimensions are not small and curled up but large, perhaps infinite in size? Would there be any observable consequences? So they build models of what the universe might look like if it consisted of objects called branes (short for “membranes”).