Other universe have mass.
Other universes are displaced by matter.
Force exerted towards matter by other universe displaced by matter is
gravity.
There is no evidence of other universes.
of course there is .. the same evidence as for aether .. didn't you know?
Every time a double slit experiment is performed is evidence of
aether.
In the following two articles what is referred to as 'dark matter' is
displaced aether.
Aether has mass.
Aether is displaced by matter.
A moving particle has an associated aether wave. The particle
travels a single path and physically enters and exits a single slit.
It is the associated aether displacement wave which physically enters
and exits multiple slits. The aether displacement wave physically
exits the slits and physically creates interference. This interference
physically alters the direction the particle travels. Detecting the
particle causes a physical loss of coherence between the particle and
its associated aether displacement wave and there is no interference.
What is described as dark matter in the following articles is more
correctly described as displaced aether. What is observed is aether
physically displaced by matter.
'Hubble Finds Ghostly Ring of Dark Matter'
http://www.nasa.gov/mission_pages/hubble/news/dark_matter_ring_feature.html
"Astronomers using NASA’s Hubble Space Telescope got a first-hand view
of how dark matter behaves during a titanic collision between two
galaxy clusters. The wreck created a ripple of dark mater, which is
somewhat similar to a ripple formed in a pond when a rock hits the
water."
The 'pond' consists of aether.
The 'ripple' is an aether displacement wave.
'Dark Halo Around Our Galaxy Looks Like Squished Beach Ball'
http://www.space.com/scienceastronomy/100106-dark-matter-halo-milky-way.html
"Dark matter seems to shroud the remaining visible matter in giant
spheres called haloes."
The Milky Way's halo is displaced aether.
"But the new study found that the Milky Way's halo isn't exactly
spherical, but squished. In fact, its beach-ball form is flattened in
a surprising direction — perpendicular to the galaxy's visible,
pancake-shaped spiral disk."
All of the aether displaced by the matter exerts force towards the
matter. The force exerted towards the matter by the aether displaced
'above' and 'below' (i.e. perpendicular to) the plane of the galaxy's
spiral disk offset. It is the aether which is displaced outward
relative to the plane of the spiral disk which exerts force towards
the center of the galaxy. This forces the matter closer together which
results in the displaced aether (i.e. dark matter) looking like a
squished beach ball.
Force exerted towards matter by aether displaced by matter is gravity.