Question

Why do many scientists believe time began at a Big Bang?


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Answer 1

Answer:

When cosmic inflation came to a sudden and still-mysterious end, the more classic descriptions of the Big Bang took hold. A flood of matter and radiation, known as “reheating,” began the process of populating our universe with the stuff we know today -- particles, atoms, stars, galaxies and so on.

Answer 2

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Why do many scientists believe time began at a Big Bang?

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When cosmic inflation came to a sudden and still-mysterious end, the more classic descriptions of the Big Bang took hold. A flood of matter and radiation, known as “reheating,” began the process of populating our universe with the stuff we know today -- particles, atoms, stars, galaxies and so on.