Dark fluid - is 95% of cosmos made of negative mass?

Recently, a physicist from Oxford University, Mr. Jamie Farnes have theorised that there may be a single entity called dark fluid, instead of the two different hypothetical entities namely, dark matter and dark energy, which together consist of 95% of the entire cosmos by mass-energy ratio. This unification of these two separate entities can be a step forward towards the unification of all the fundamental laws of nature, which we often refer to as the theory of everything.

Matter at a large scale, like that in huge cluster of galaxies, behave in a different way, than that on a quantum level, where particles keep popping in and out of the existence, and hence we have different laws to explain their behaviour at two different levels.

However, a theory put recently by Jamie Farnes can be a leap forward to a unified theory to explain everything. According to this new theory, there is no such thing like dark matter or dark energy. Rather they are a single entity which he refer to as dark fluid. This entity has a very strange nature, as it has a negative mass, as well as repulsive gravity. So far, we have known that everything around us has a positive mass and an attractive nature of gravity. But, what if there is something in the cosmos to balance these, as per nature's law of balancing. And hence, this entity shall have a negative mass as well as repulsive gravity unlike ordinary matter. To get an idea about it, consider pushing an object made of dark fluid, away from you. Then it will actually move towards you, rather than going away, as it should, in the direction of applied force !

Actually, this theory has its roots in a note that Einstein made for himself, a century ago, in 1918. In this note, he mentioned something about negative mass, to explain his cosmological constant in his static model of universe. He had theorised that there must be something to counterbalance gravity in a static universe, otherwise the entire cosmos would collapse in itself due to this gravity, and his theory would become invalid. For this, he added the cosmological constant in his model. However, later his static model was proved wrong, when Hubble discovered through his observations, that universe was not static at all, rather it was expanding with accelerated rate. Due to this, Einstein said his failure to explain the dynamic model of universe, his greatest blunder. But, actually his cosmological constant has been really helpful in explaining the nature of dark energy, so far. After this incidence, this note was also lost in history. But no one knew that someday it could become a major reason behind explaining the origin of universe.

Dark matter is something that is believed to be responsible for uniformity in the velocities of stars in a galaxy as well as stable structures at large scale, like galaxies, cluster of stars and galaxies, etc. While the dark energy is responsible for an accelerated expansion of the universe, since the big bang. However, it still remains a mystery that why expansion at the beginning was much more than that of today.

Dark matter is thought to comprise 85% of entire matter of universe, and the rest 15% is just ordinary matter. But when both mass-energy composition is considered, dark matter becomes only 27%, while this composition is dominated by the dark energy with 68% means more than two-third. The rest 5% is ordinary matter, but even this part is mainly made of dust and gases. Only a tiny part of this small 5% ratio is what stars, planets and everything around us, is made up of.

Jamie Farnes has said that if every other property of matter is polarised (means it can have positive as well as negative values), then why mass and gravity are considered monopolized. He also says that perhaps we had an aesthetic solution to the greatest mysteries of universe all the time. We just forgot to put a negative sign. However, at the same time, he also says that a lot is still needed to be researched about this new concept. And it needs experimental as well as observational evidence for its validity.

Dark fluid, if proved right, can become a major breakthrough in our quest for solving the greatest mysteries that are unexplainable with our current understanding and laws of physics.