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Did the universe start from the size of a pin needle?

Answer 1

No one knows and everyone speculates.

When it comes to the size, scientists studying singularities in the form of black holes that currently exist in the universe disagree about how big they are at the "bottom." I put that word in quotes because a singularity by definition lacks any kind of dimension. Almost everyone agrees that it was a singularity of some kind.

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Answer 2

Christopher Ales

The Big Bang theory is linked to the idea that the universe began at a size smaller than a pinhead, implying an extremely hot and dense initial singularity.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.