・From it is to us that can not be recognized only three spatial dimensions, we can not see dark matter in motion in the other seven spatial dimension.
・Mass of dark matter is thought to kinetic energy of the particles in motion in the other seven spatial dimensions.
・And space is accelerating expansion, but the density of dark energy is not thin.
[Reference] "Does the universe is made of what" Hitoshi Murayama
From the above, I can assume the following things.
☆ Dark energy, dark matter and material is in the "equilibrium" state of the long-time scale between 10 spatial dimensions. = Dimension "equilibrium"
☆ Dark energy is the kinetic energy of the particles in motion in the other seven spatial dimensions.
☆ Inside of the universe to accelerate expansion, dark energy comes springs.