Source: https://arxiv.org/abs/2004.14192 (There was also a pretty good discussion about it here on HN.)
> would probably be too small to notice without some sort of detection equipment.
What makes you think that?
Theoretically, black holes can have a mass of the tiniest fraction of a gram which would be unimaginabley small. It's my own speculation that you wouldn't be able to detect that with a naked eye.
> you wouldn't be able to detect that with a naked eye.
What if you touched it? No idea what the spacetime would look like near a gram-sized black hole with lots of heavier matter surrounding it but I suppose there would still be pretty severe tidal forces.
Keep in mind that event horizon isn't a shell, just a point at which your future (which is in the singularity) is certain.
Yeah, exactly my thought. Then again, we're silently assuming here that spacetime would pretty much look like one of the vacuum black hole solutions plus some additional matter (our body) near it. That doesn't seem too likely, given that our body is much heavier and can't just be treated as a test particle. OTOH it doesn't seem too likely, either, that the actual spacetime would look completely different: There will surely still be a black hole and an event horizon.