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Index to Creationist Claims,  edited by Mark Isaak,    Copyright © 2007
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Claim CE410:

Physicists only assume that physical constants have been constant over billions of years. In particular, this untestable assumption underlies all radiometric dating techniques.


Brown, Walt, 1995. In the Beginning: Compelling evidence for creation and the Flood. Phoenix, AZ: Center for Scientific Creation, p. 24.


  1. The constancy of constants is a conclusion, not an assumption. It is tested whenever possible. For example:


Ball, Philip, 2003. Lab tests tenets' limits. Nature Science Update,

SpaceDaily, 2004. Quasar studies keep fundamental physical constant - constant.


  1. Bize, S. et al., 2003. Testing the stability of fundamental constants with the 199Hg+ single-ion optical clock. Physical Review Letters 90: 150802.
  2. Chand, H., R. Srianand, P. Petitjean and B. Aracil, 2004. Probing the cosmological variation of the fine-structure constant: Results based on VLT-UVES sample. Astronomy and Astrophysics 417: 853.
  3. Cho, Adrian. 2006. Skewed starlight suggests particle masses changed over eons. Science 312: 348.
  4. Fischer, M. et al., 2004. New limits on the drift of fundamental constants from laboratory measurements. Physical Review Letters 92: 230802.
  5. Fujii, Yasunori et al., 2000. The nuclear interaction at Oklo 2 billion years ago. Nuclear Physics B 573: 377-401.
  6. Marion, H. et al., 2003. Search for variations of fundamental constants using atomic fountain clocks. Physical Review Letters 90: 150801.
  7. Musser, George, 1998. Inconstant constants. Scientific American 279(5) (Nov.): 24,28.
  8. Shlyakhter, A. I., 1976. Direct test of the constancy of fundamental nuclear constants. Nature 264: 340.
  9. Webb J. K., V. V. Flambaum, C. W. Churchill, M. J. Drinkwater, J. D. Barrow, 1999. Search for time variation of the fine structure constant. Physical Review Letters, 82: 884-887.

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created 2001-2-18, modified 2007-12-16