Studies discover speed of light may not be constant March 29, 2013 FlytrapLife On The Big Blue Marble (News)Two new studies suggest the speed of a photon in a vacuum may fluctuate by as much as 50 quintillionths of a second per square meterPicky, picky, picky…Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Like this:Like Loading...Related