In this question on the physics site, it is asked if astronomical objects can be conscious. Now, in a sense, every object has to be "conscious" somehow, as every object is composed of the same stuff. Stones are considered as dead though and jellyfish or bacteria as conscious. In this article written by Rupert Sheldrake said to induce strong emotions, and indeed, it does!) it is conjectured that stars are conscious. Because of this, there is no need for dark matter. Dark matter makes galaxies behave in a way that can't be explained by using the law of gravity (Newton's law of universal gravity). The amount of observed mass is not enough to make the galaxies rotate in the predicted way. So non-observable mass has to be added (dark matter), or the law of gravity has to be changed, which is done in MOND (classical) or in the emergent gravity theories (quantum).
Sheldrake offers another explanation. The observed divergent behavior of the moving stuff in galaxies (first detected by Zwicky) is explained by the stars emitting rays of matter in the right direction. By this, they try to reach other stars. In a kind of battle of the stars (as compared to the evolution of life in the theory of evolution), they can eat each other(!) and grow (evolve). The supposed matter rays are emitted by the stars in such a way that they give rise to the observed behavior of the galaxies. The stars are compare with cells in a developing embryo heading to their supposed place in the developing creature. It is thought that the stars are sufficiently complex in Nature to give rise to the directed emission of matter rays.
Now, I can imagine that stars do that, but is there any astronomical evidence that they don't?
The thing I find ridiculous is the stars having consciousness. Stars that try to find prey? Maybe the sun is conscious somehow. And there are people who see the sun as a god. But these people don't pretend to be scientific. Sheldrake does. So looking at it scientifically, is there evidence of these rays? They could be emerging from the sun, but how could we know if these rays are not directed to us (they are supposedly emitted in the direction of motion so something similar caused by the existence of dark matter is observed)? Are there observations of stars that just contradict his view? I know the burden of proof is his to carry, but I don't suppose he's gonna try to prove the rays to exist (as explained in a comment, this would probably harm his reputation if they not exist).
So, to explain the divergent behavior of the galaxies (and stars in them) one can propose that the behavior is caused by emitted rays of energy-matter. The rays are emitted in the direction of velocity (a similar theory of gravity was proposed once: Le Sage's theory of gravitation, also called shadow gravity). Is this conjecture just false in the light of modern observations? That is, are stars known not to emit these rays? Can't calculations show that these rays have to be very massive in order for them to propel the stars in such a way that they show dark matter behavior?