On Wednesday, 22 August 2018 07:40:34 UTC-4, Gary Harnagel wrote:
On Wednesday, August 22, 2018 at 12:07:02 AM UTC-6, Chris.B wrote:

Dark matter is just leakage across the boundaries of countless,
tightly nested universes.

I consider that a distinct possibility. And that would make the
search for dark matter a really, really frustrating task.

Dark matter is great. Can't be seen, doesn't interact with anything, the only evidence that it's there is gravimetric. If the stuff has any appreciable density anywhere and yet still can't be seen, even as a veil over something else, then it's actually invisible.