In physics, energy has an equivalent amount of mass.
DM and DE are unknown mass and energy. All I am suggesting is if the universe truly so full of DM and DE we should be able to observe some in near space. The research done by Dr. Ian Stevenson and Dr. Jim Tucker at the University of Virginia suggests that there is energy and mass transferred from a deceased to an infant in the process they have documented as reincarnation. Both of these are unknown substances like DM and DE. I am suggesting that we have two unknown energies and masses and they might be related. It needs more research of course, but right now no one is looking that I am aware.