Question: Is there any consensus about how long the Big Bang lasted?

How long does the Big Bang last?

13.8 billion years At its simplest, it says the universe as we know it started with an infinitely hot, infinitely dense singularity, then inflated — first at unimaginable speed, and then at a more measurable rate — over the next 13.8 billion years to the cosmos that we know today.

How long has the Big Bang theory been accepted?

The discovery and confirmation of the cosmic microwave background radiation in 1965 secured the Big Bang as the best theory of the origin and evolution of the universe.

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