Journal for General Philosophy of Science

, Volume 50, Issue 1, pp 171–180 | Cite as

Why ‘NOW’?

  • Peter J. RiggsEmail author


A recently published hypothesis on the nature of time by physicist Robert Muller seeks to provide an objective account of the present moment (the ‘now’) and the ‘flow’ of time. Muller also claims that his hypothesis makes testable predictions. It is shown that the predictions offered cannot be used to test Muller’s hypothesis, that the hypothesis (as presented) does not rate scientific status, has a number of questionable metaphysical premises, and is merely a re-fashioning of the Growing Block theory of time.


Now Flow of time New time Cosmological expansion Growing block 



The author thanks the anonymous reviewer for helpful suggestions.


  1. Alexander, S. (1920). Space, time, and deity. London: Macmillan.Google Scholar
  2. Al-Khalili, J. (2012). Black holes, wormholes & time machines (2nd ed.). Boca Raton, FL: CRC Press.Google Scholar
  3. Bojowald, M. (2017). Review of ‘Now: The physics of time’. Physics Today, 70, 57.CrossRefGoogle Scholar
  4. Bourne, C. (2002). When Am I? A tense time for some tensed theorists. Australasian Journal of Philosophy, 80, 359–371.CrossRefGoogle Scholar
  5. Braddon-Mitchell, D. (2004). How do we know it is now now? Analysis, 64, 199–203.CrossRefGoogle Scholar
  6. Braddon-Mitchell, D. (2013). Fighting the Zombie of the Growing Salami. In K. Bennett & D. Zimmerman (Eds.), Oxford studies in metaphysics (Vol. 8). Oxford: Oxford University Press.Google Scholar
  7. Broad, C. D. (1925). Scientific thought. London: Kegan Paul.Google Scholar
  8. Callender, C. (2000). Shedding light on time. Philosophy of Science, 267(Supplement), S587–S599.CrossRefGoogle Scholar
  9. Callender, C. (2008). The common now. Philosophical Issues, 18, 339–361.CrossRefGoogle Scholar
  10. Callender, C. (2017). What makes time special?. Oxford: Oxford University Press.CrossRefGoogle Scholar
  11. Dainton, B. (2010). Time and space (2nd ed.). Durham: Acumen.Google Scholar
  12. Davies, P. (2014). The arrow of time. Euresis, 7, 47–59.
  13. Denbign, K. G. (1975). An inventive universe. London: Hutchison.Google Scholar
  14. Deng, N. (2017). Making sense of the growing block view. Philosophia, 45, 1113–1127.CrossRefGoogle Scholar
  15. Dieks, D. (2006). Becoming, relativity and locality. In D. Dieks (Ed.), The ontology of spacetime. Amsterdam: Elsevier.Google Scholar
  16. Dorato, M., & Wittmann, M. (2015). The now and the passage of time: From physics to psychology. KronoScope: Journal for the Study of Time, 15, 191–213.CrossRefGoogle Scholar
  17. Dowden, B. (2013). Time. In: The Internet Encyclopedia of Philosophy (ISSN 2161-0002, 2013).
  18. Earman, J. (2008). Reassessing the prospects for a growing block model of the universe. International Studies in the Philosophy of Science, 22, 135–164.CrossRefGoogle Scholar
  19. Ellis, G. F. R. (2007). Physics in the real universe: Time and space–time. In V. Petkov (Ed.), Relativity and the dimensionality of the world. Dordrecht: Springer.Google Scholar
  20. Ellis, G. F. R. (2013). The arrow of time and the nature of spacetime. Studies in History and Philosophy of Modern Physics, 44, 242–262.CrossRefGoogle Scholar
  21. Ellis, G. F. R. (2014a). The evolving block universe and the meshing together of times. Annals of the New York Academy of Sciences, 1326, 26–41.CrossRefGoogle Scholar
  22. Ellis, G. F. R. (2014b). Time really exists! The evolving block universe. Euresis, 7, 11–26.
  23. Faye, J. (1989). The reality of the future: An essay on time, causation and backward causation. Odense: Odense University Press.Google Scholar
  24. Fitzgerald, P. (1972). Nowness and the understanding of time. In PSA 1972: Proceedings of the biennial meeting of the philosophy of science association. Chicago: Philosophy of Science Association.Google Scholar
  25. Fraser, J. T. (1987). Time, the familiar stranger. Redmond: Tempus Books.Google Scholar
  26. Greene, B. (2004). The fabric of the cosmos: Space, time and the texture of reality. London: Penguin.Google Scholar
  27. Grünbaum, A. (1973). Philosophical problems of space and time (Boston studies in the philosophy of science) (Vol. 12). Dordrecht: Reidel.Google Scholar
  28. Heathwood, C. (2005). The real price of the dead past: A reply to Forrest and to Braddon-Mitchell. Analysis, 65, 249–251.CrossRefGoogle Scholar
  29. Hempel, C. G. (1966). Philosophy of natural science. New York: Prentice-Hall.Google Scholar
  30. Horwich, P. (1987). Asymmetries in time: Problems in the philosophy of science. Cambridge, Mass: MIT Press.Google Scholar
  31. Hoyng, P. (2006). Relativistic astrophysics and cosmology: A primer. Berlin: Springer.CrossRefGoogle Scholar
  32. Jardine-Wright, L. (2016). Rethinking the arrow of time: Citing shortcomings in Eddington’s theory, a physicist proposes a new explanation for the existence of “now”. Science, 353(30), 1504.CrossRefGoogle Scholar
  33. Kosso, P. (1992). Reading the book of nature: An introduction to the philosophy of science. Cambridge: Cambridge University Press.CrossRefGoogle Scholar
  34. Kroes, P. (1984). Objective versus minddependent theories of time flow. Synthese, 61, 423–446.CrossRefGoogle Scholar
  35. Lee, B. (2016). A defeating objection to dynamic block theories of time. Thought, 5, 185–189.Google Scholar
  36. Lewens, T. (2015). The meaning of science. London: Penguin Books.Google Scholar
  37. Lobo, F. S. N. (2008). Nature of time and causality in physics. In S. Grondin (Ed.), Psychology of time. Bingley, West Yorkshire: Emerald Group Publishing.Google Scholar
  38. Merricks, T. (2005). Goodbye growing block. In D. W. Zimmerman (Ed.), Oxford studies in metaphysics (Vol. 2). Oxford: Oxford University Press.Google Scholar
  39. Montani, G., Battisti, M. V., Benini, R., & Imponente, G. (2011). Primordial cosmology. New Jersey: World Scientific.CrossRefGoogle Scholar
  40. Muller, R. A. (2016). NOW: The physics of time. New York: W.W. Norton.Google Scholar
  41. Muller, R. A., & Maguire, S. (2016). Now and the flow of time. arXiv:1606.07975v1. (Cornell University Library).
  42. Newton-Smith, W. H. (1980). The structure of time. London: Routledge & Kegan Paul.Google Scholar
  43. Oaklander, L. N. (2001). Tooley on time and tense. In L. N. Oaklander (Ed.), The importance of time. Dordrecht: Kluwer.CrossRefGoogle Scholar
  44. Peterson, D., & Silberstein, M. (2010). Relativity of simultaneity and eternalism: In defense of the block universe. In V. Petkov (Ed.), Space, time, and spacetime: Physical and philosophical implications of Minkowski’s unification of space and time. Berlin: Springer.Google Scholar
  45. Petkov, V. (2017). Spacetime and reality: Facing the ultimate judge. In S. Wuppuluri & G. Ghirardi (Eds.), Space, time, and the limits of human understanding. Cham: Springer.Google Scholar
  46. Price, H. (1996). Time’s arrow and Archimedes’ point: New directions for the physics of time. Oxford: Oxford University Press.Google Scholar
  47. Price, H. (2011). The flow of time. In C. Callender (Ed.), The Oxford handbook of philosophy of time. Oxford: Oxford University Press.Google Scholar
  48. Prosser, S. (2007). Could we experience the passage of time? Ratio, 20, 75–90.CrossRefGoogle Scholar
  49. Prosser, S. (2013). The passage of time. In H. Dyke & A. Bardon (Eds.), A companion to the philosophy of time. Chichester: Wiley-Blackwell.Google Scholar
  50. Prosser, S. (2016). Experiencing time. Oxford: Oxford University Press.CrossRefGoogle Scholar
  51. Riggs, P. J. (2017). The Perceptions and experience of the “passage” of time. The Philosophical Forum, 48, 3–30.CrossRefGoogle Scholar
  52. Rijsdijk, C. (2016). Book review: ‘Now—The physics of time’. MNASSA: Monthly Notes of the Astronomical Society of South Africa, 75(9–10), 246.Google Scholar
  53. Rindler, W. (2006). Relativity: Special, general, and cosmological (2nd ed.). Oxford: Oxford University Press.Google Scholar
  54. Romero, G. E. (2015). Present time. Foundations of Science, 20, 135–145.CrossRefGoogle Scholar
  55. Rovelli, C. (1995). Analysis of the distinct meanings of the notion of ‘time’ in different physical theories. Il Nuovo Cimento B, 110, 81–93.CrossRefGoogle Scholar
  56. Sanders, R. (2016). In exploring the ‘now,’ new book links flow of time with Big Bang. Berkeley News (20 September).
  57. Sider, T. (2003). Four-dimensionalism. Oxford: Oxford University Press.Google Scholar
  58. Smart, J. J. C. (1963). The river of time. In A. Flew (Ed.), Essays in conceptual analysis. London: Macmillan.Google Scholar
  59. Smith, N. J. J. (2011). Inconsistency in the A-theory. Philosophical Studies, 156, 231–247.CrossRefGoogle Scholar
  60. Tallant, J. (2007). There have been, are (Now), and will be lots of times like the present in the hybrid view of time. Analysis, 67, 83–86.CrossRefGoogle Scholar
  61. Tegmark, M. (2014). Our mathematical universe. New York: Knopf.Google Scholar
  62. Thomas, E. (2017). The roots of C. D. Broad’s growing block theory of time. Mind. Scholar
  63. Zimmerman, D. W. (2005). The A-theory of time, the B-theory of time, and ‘taking tense seriously’. Dialectica, 59, 401–457.CrossRefGoogle Scholar
  64. Zimmerman, D. W. (2011). Presentism and the space–time manifold. In C. Callender (Ed.), The Oxford handbook of philosophy of time. Oxford: Oxford University Press.Google Scholar

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Authors and Affiliations

  1. 1.Department of Quantum ScienceAustralian National UniversityCanberraAustralia

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