ALSO, DINOSAURS!!1
http://scienceray.com/earth-sciences/nuclear-reactors-in-the-land-before-time-oklo-fossil-reactors-attack-einstein-relatively-speaking/
Hmm. Interesting, but may not be accurate. Need to subscribe to PRC... DOI: 10.1103/PhysRevC.74.064610 (http://link.aps.org/doi/10.1103/PhysRevC.74.064610).
Oklo has been known about since 1972, most of the recent studies have found that alpha probably doesn't vary, many of the older studies had flaws.