• Jean-Philippe Uzan
  • Bénédicte Leclercq
Part of the Springer Praxis Books book series (PRAXIS)


Early in 1999, a brief communication appeared in the prestigious American scientific journal Physical Review Letters, and created a stir throughout the world of physics. An international team of astrophysicists led by John Webb, of the University of New South Wales, Sydney, had analysed light coming from the edge of the universe. They concluded that the value of a constant of Nature, familiarly known as alpha (α), seems to have been smaller 10 billion years ago.


Gravitational Force Fundamental Constant Fundamental Physical Theory Large Number Hypothesis Mathematical Beauty 


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Copyright information

© Praxis Publishing Ltd. 2008

Authors and Affiliations

  • Jean-Philippe Uzan
    • 1
  • Bénédicte Leclercq
    • 2
  1. 1.Institut d’Astrophysique de ParisCNRSParisFrance
  2. 2.Pour la scienceParisFrance

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