no visible bruises

No, 'Bruises' is likely fictional. Many stories are created from the imagination of the author rather than being based on real events.

It depends on the platform or medium where the stories are published. Some might be visible indefinitely, while others could disappear after a certain period.

It depends on various factors. Some stories might remain visible for a short period, like a few days or weeks, while others could be accessible for months or even years, depending on the platform and its policies.

Another reason might be related to his home situation. Although it's not as prominent in the fanfiction's context perhaps, in the original story, the Dursleys were not kind to Harry. If this aspect is incorporated into the fanfiction, it could be that he got the bruises from their mistreatment before coming to Hogwarts.

I'm not entirely sure what specific 'yarn', 'stories' and 'bruises' are being referred to here. It could be a story about a knitting project (yarn) that had some mishaps (bruises) and all the tales associated with it. But without more context, it's hard to tell the full story.

Bruises have a rather interesting full story. They can happen in various ways. Maybe you're in a hurry and accidentally walk into a doorframe. This sudden impact can damage the blood vessels just beneath your skin. The body's immediate response is to try and contain the damage. The leaked blood starts to clot, which is why the bruise initially looks like a red or purple mark. As time passes, the body reabsorbs the blood components. The hemoglobin in the red blood cells breaks down, which is what causes the color changes in the bruise over time. It's a complex yet common physiological process that shows how the body deals with minor traumas like those that cause bruises.

I'm not sure who the specific author of the 'Darkness Visible' novel is without more context. There could be multiple novels with this title.

The 'Darkness Visible' novel is likely to be about various themes related to the concept of 'darkness'. It might explore the psychological darkness within characters, such as their hidden fears, traumas, or moral ambiguities. It could also be set in a dark or dystopian world where the characters struggle against oppressive forces or difficult circumstances.

A Facebook story is usually visible for 24 hours.

In most cases, mange mites are too small to be visible without magnification.