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An accessible introduction to “pre‑Big Bang” cosmological models inspired by string theory. The author explores how string theory might replace the traditional Big Bang singularity with a prior phase of cosmic evolution, and considers observational signatures — such as relic gravitational radiation — that could reveal traces of a universe existing before the Big Bang

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245: $a: The Universe Before the Big Bang: Cosmology and String Theory
245: $b:
082: $a:
100: $a: Maurizio Gasperini
650: $a: Physics
250: $a:
440: $v:
250: $b: Springer
250: $c: 2008
020: $a: 978‑3‑540‑74421‑4
300: $a: 208