Rotating Question Curious About Astronomy? Ask an Astronomer
Did the speed of light change over the history of the universe?
I read recently on the internet that the speed of light early in
the expansion process, post-Big Bang, may have been greater than
the speed of light now. How is that possible, and if true, what
are the general implications for our understanding of the basic
scientific principles we live by now?  The article was in
yahoo's science news section sometime last week. Close as I can
get, sorry.  It seems like the article you read was only one of
many which reviewed a paper sent to the journal Nature this
month. The New York Times and also both carried a similar
article (based on your description - I could not find the one
from Yahoo).  The article in Nature talks about the possibility
of the speed of light changing over the history of the universe.
Where this stems from is observational evidence that the "fine
structure constant" has changed. The fine structure constant
determines the exact