MSNBC is reporting on rising doubts among scientists - particularly Cambridge Univeristy astronomer Michael Murphy - as to whether key physical constants are actually constant. The new evidence goes beyond c-decay or the variable speed of light cosmology, and posits changes in the constants governing the four fundamental forces. (Side-note: does anyone know why Wikipedia describes c-decay as a crackpot, pseudo-science claim, and even Answers in Genesis is skeptical about it, but the 'variable speed of light cosmology' is considered to be a real scientific theory, and in description Wikipedia says "The idea is that light propogated as much as sixty times faster in the distant past?" Which Wikipedia article is in error, or is there some difference between the two accounts that I am not seeing?) In particular, it appears that the spectrum of light may have been different billions of years ago, based on analysis of light emitted from distant quasars, and this can be explained by minute decreases in c, the speed of light, and increases in α, the electro-magnetic force constant. If string theory is correct, these variations could be explained by slight changes in the geometry of the invisible string-theoretic dimensions. More info at SPACE.com.
(HT: slashdot)Posted by Kenny at July 14, 2006 11:19 AM
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