(link) Gravitational waves provide dose of reality about extra dimensions

[dsmike1980]

https://phys.org/news/2018-09-gravitatio...sions.html

Any fictional universes using slipstream drives are slightly screwed.

[stevebowers]

The main thing I take away from this is that gravitational leakage into other branes is minimal. In some ways this is a good thing. We don't want random gravitational influences intruding into our universe. However it does make inter-brane communications significantly more difficult.

[dsmike1980]

The main thing I take away from this is that gravitational leakage into other branes is minimal.

I though of that too. It doesn't necessarily mean that they're not there, just that gravity permeate all of them like I had always been told it does.