THEORIES:
 I sometimes wonder:  Everytime a person  talks about alien abduction, they describe the experience lights, sounds, strage forces and temporal changes.  Many think that UFOs and aliens visit the earth, and take these people.  I think that mabey what we are experiencing here is tiny ripples in space time, which allows us to experience a different dimension.
    Along these lines, I believe that with drugs, specifically hallucinogenics, Our brains are capable of shifting space time to allow us to exist in a sightly shifted dimension.  The brain using the elctrochemical processes with the ability to arange Fe⁺ in the hemeglobin in the blood in the vessels surrounding the electrto-chemical center of the organism.
in such a way to create an electro-magnetic shift in time-space.  Subsequently, there is a basal space-time level.  Each animal with it different brain configurations affects space-time in different ways.  This is backed with differring classification  used for animal years, like dog years, horse years, etc.  We've essentially known this all along, Because we know that an animal's life is linked to its brain.  The brain of an animal is going to increase the shift  from basal spacetime to exist.  The more the brain can shift from base line the more intricate the world can be perceived.  The animals that are able to minipulate this to there atvantage are going to live longer happier existences.