[grey_whiskers]

This may also be related to why the strength of gravity is so much smaller than the other basic forces. All four should be roughly the same, but gravity is next to nothing by comparison. If most of the gravity is leaking, what we see is the small amount remaining in our universe.

Does the theory cover why it is only *gravity* that leaks?

Or is it that gravity is the only one of the four forces for which we can observe significant macroscopic effects on other massive bodies (i.e. galaxies) over astronomical distances?

I.e. strong and electroweak I wouldn't expect to notice affecting things however many gazillion light years away...

Full Disclosure: Whiskey Tango Foxtrot?

[Mind-numbed Robot]

Does the theory cover why it is only *gravity* that leaks?

Not true! Depends leak.

[RightWhale]

The idea, I think, is that gravity actually works over more than the three spatial dimensions. It is different from the other three forces somehow in that it is roughly inverse square. During the Big Bang at high temperature and pressure and very small dimensions, all four forces were one, but as things cooled there was a phase change and these different behaviors began.