Nuclear Data in Oklo and Time-Variability of Fundamental Coupling   Constants
  We re-examined Shlyakhter's analysis of the Sm data in Oklo. With a special care of minimizing contamination due to the inflow of the isotope after the end of the reactor activity, we confirmed that his result on the time-variability of the fine-structure constant, $|\dot{\alpha}/\alpha |\lsim 10^{-17}{\rm y}^{-1}$, was basically correct. In addition to this upper bound, however, we obtained another result that indicates a different value of $\alpha$ 2 billion years ago. We add comments on the recent result from QSO's. 
Yasunori Fujii, Akira Iwamoto, Tokio Fukahori, Toshihiko Ohnuki,   Masayuki Nakagawa, Hiroshi Hidaka, Yasuji Oura, Peter Moller