What is the gravitational singularity known as the Big Bang?

The universal origin story known as the Big Bang postulates that, 13.7 billion years ago, our universe emerged from a singularity — a point of infinite density and gravity — and that before this event, space and time did not exist (which means the Big Bang took place at no place and no time).

Explanation:

i'm sure the answer you are looking for would be

a. an ice age

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