The article doesn't explain what distinguishes a gravitational singularity from a mathematical singularity in GR equations. I put "sometimes" but someone took it away.
Here's the diff: mathematical singularities don't *always* means gravitational singularities because they can be artifacts of the coordinate system used.
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... mm) long and opens in the vulva between the clitoris and the vaginal opening.
In the human male, the urethra is about 8 inches (200 mm) long and opens at the end of ...