“For me MOND is just as nonstandard as ΛCDM.”

—  Pavel Kroupa

Pavel Kroupa (in debate with Simon White) Dark Matter - The Debate - YouTube, uploaded on Dec 31, 2010 https://www.youtube.com/watch?v=EZF9bPVOsb4

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Pavel Kroupa 8
Australian astrophysicist 1963

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“The concordance model of cosmology, ΛCDM, provides a satisfactory description of the evolution of the universe and the growth of large scale structure. Despite considerable effort, this model does not at present provide a satisfactory description of small scale structure and the dynamics of bound objects like individual galaxies. In contrast, MOND provides a unique and predictively successful description of galaxy dynamics, but is mute on the subject of cosmology. … it is far from obvious that the mass spectrum of galaxy clusters or the power spectrum of galaxies can be explained in MOND, two things that ΛCDM does well. Critical outstanding issues are the development of an acceptable relativistic parent theory for MOND, and the reality of the non-baryonic dark matter of ΛCDM. Do suitable dark matter particles exist, or are they a modern aether?”

Stacy McGaugh (1964) American astronomer

A Tale of Two Paradigms: the Mutual Incommensurability of LCDM and MOND, Stacy McGaugh, 29 Apr 2014, updated 17 May 2014 http://arxiv.org/abs/1404.7525,

“A long standing prediction (Milgrom 1983) of MOND is that rotating galaxy curves will fall on a single mass-velocity relation with slope 4: Mb \propto Vf4. This prediction is realized in multiple independent data sets. Gas rich galaxies fall where predicted by MOND with no free parameters. There are not many predictions in extragalactic astronomy that fare so well a quarter century after their publication. … a physical understanding for why galaxy formation in the context of ΛCDM should pick out the particular phenomenology predicted a priori by MOND remains wanting.”

Stacy McGaugh (1964) American astronomer

[Stacy McGaugh, 2011, The Baryonic Tully-Fisher Relation of Gas-Rich Galaxies as a Test of ΛCDM and MOND, p. 16, ApJ, http://arxiv.org/abs/1107.2934]

Mordehai Milgrom photo

“The nice thing is that MOND has not had to change or adjust itself to the many observations that came after it was proposed. … In the end, the process that might sway people's minds could be a slow one, in which they become disillusioned and dissatisfied with DM, while MOND explains more and more of the observations. And, if MOND does turn out to have some truth to it, the fact that it encountered so much opposition will just show how nontrivial a thought it was.”

Mordehai Milgrom (1946) Israeli physicist

"Dark Matter Heretic," 2003

Jacob Bekenstein photo

“There is a prescription that works well, MOND, but the reason it works so well is not known. You may say that MOND tells us how the real theory of gravity should look.”

Jacob Bekenstein (1947–2015) Mexican-Israeli physicist

as quoted in: [Milgrom, Mordehai, MOND from a brane-world picture, arXiv preprint arXiv:1804.05840, 2018, https://arxiv.org/abs/1804.05840] (p. 2)

“MOND works far too well! In fact, just as planetary systems are Keplerian objects, galaxies are Milgromian objects. Milgrom’s discovery of a0 is likely as epochal as Planck’s discovery of h.”

Pavel Kroupa (1963) Australian astrophysicist

[21 March 2011, Pavel Kroupa: The Dark Matter Crisis website, https://darkmattercrisis.wordpress.com/2011/03/21/question-c-ii-mond-works-far-too-well/]

Mordehai Milgrom photo

“It seems to me that in understanding MOND and its fundamentals we have only scratched the surface. If the developments of quantum mechanics and relativity are any lesson here, departures of such magnitude from long- and well-tested physics may bring with them completely new concepts, not summarized by mere modifications of the governing actions or the equations of motion. MOND may also turn out to bring in concepts that are presently beyond our ken”

Mordehai Milgrom (1946) Israeli physicist

as hinted perhaps by the cosmological connotations of a<sub>0</sub>
MOND Theory, p. 5, Mordehai Milgrom, 30 Apr 2014, updated 31 Aug 2014 http://arxiv.org/abs/1404.7661,

Alexandre Dumas, fils photo

“In the interest of the dictionaries of the future let me lay down the principle that the Demi-Monde, contrary to the common belief and in spite of what is printed, does not represent the ruck of courtesans, but the class of women that have lost caste.”

Alexandre Dumas, fils (1824–1895) French writer and dramatist, son of the homonym writer and dramatist

Établissons donc ici, pour les dictionnaires à venir, que le Demi-Monde ne représente pas, comme on le croit, comme on l'imprime, la cohue des courtisanes, mais la classe des déclassées.
Preface to Le Demi-Monde (1855), in Théatre complet de Al. Dumas fils (Paris: Michel Lévy Frères, 1868-98) vol. 2, p. 9; translation from Albert D. Vandam Undercurrents of the Second Empire (London: William Heinemann, 1897) p. 246.

Mordehai Milgrom photo

“What makes MOND particularly intriguing is that it predicted many effects that could not even be tested when I formulated it.”

Mordehai Milgrom (1946) Israeli physicist

"Dark Matter Heretic," 2003

“Why does MOND get any predictions right? It has had many a priori predictions come true. Why does this happen?”

Stacy McGaugh (1964) American astronomer

[Stacy McGaugh, "Degenerating problemshift: a wedged paradigm in great tightness", Triton Station blog, 30 April 2017, http://tritonstation.wordpress.com/2017/04/30/degenerating-problemshift-a-wedged-paradigm-in-great-tightness/]

“I have experienced time and again people dismissing the data because they think MOND is wrong, so I am very consciously drawing a red line between the theory and the data.”

Stacy McGaugh (1964) American astronomer

as quoted in [Cooper, Keith, Correlation between galaxy rotation and visible matter puzzles astronomers, 7 October 2016, physicsworld.com, http://physicsworld.com/cws/article/news/2016/oct/07/correlation-between-galaxy-rotation-and-visible-matter-puzzles-astronomers]