The Big Bang might not be the beginning, but a recurring event.
In short: Standard cosmology suggests our universe began 13.7 billion years ago, yet this model fails to explain what caused that initial moment. Nobel Laureate Roger Penrose proposes a radical alternative: we live in an eternal loop where the end of one universe physically paves the way for the next.
The prevailing Big Bang model describes the expansion of our observable universe from its earliest known periods, but it faces a fundamental hurdle: it cannot account for the conditions that created the Big Bang itself. While many physicists explore dark matter or inflationary models to bridge this gap, Sir Roger Penrose argues that the answer lies in the Second Law of Thermodynamics. This principle states that entropy—a measure of disorder—must increase over time.
According to Penrose’s Conformal Cyclic Cosmology (CCC), an infinite sequence of cosmic cycles occurs. In this framework, the Big Bang is not a unique starting point but a recurring phenomenon. He posits that the final state of one expanding universe eventually leads directly into the beginning of the next. By viewing these transitions as conformal transformations, he attempts to resolve how a universe of extreme disorder could transition into a new state of low entropy.
Penrose’s theory stands in contrast to other multiverse hypotheses, such as the many-worlds interpretation. He critiques the latter for relying on an oversimplified version of quantum mechanics that fails to incorporate gravity, asserting that physical rules must shift when gravitational forces are involved. While Penrose acknowledges his model is highly speculative, it offers a profound shift in perspective: our current cosmic history may simply be one chapter in an infinite sequence of births and deaths.
The significance of this theory lies in its attempt to provide a mechanism for the universe's initial state without requiring a singular 'creation' event. If CCC is correct, the distant future of our universe contains the seeds of the next Big Bang, creating a cosmic lineage where time is not linear but cyclic.
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Sources
- Summary by Intellect · source: The Beginning of The Universe - Sir Roger Penrose on His Conformal Cyclic Cosmology Model
- Also: Cycles of Time: An Extraordinary New View of the Universe | work by Penrose | Britannica
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