On 4/27/13 11:55 AM, Yousuf Khan wrote:
http://is.gd/AurlR4

Two papers, published in the European Physics Journal D in March,
attempt to derive the speed of light from the quantum properties of
space itself. Both propose somewhat different mechanisms, but the idea
is that the speed of light might change as one alters assumptions
about how elementary particles interact with radiation. Both treat
space as something that isn't empty, but a great big soup of virtual
particles that wink in and out of existence in tiny fractions of a
second.



Physics FAQ: Is The Speed of Light Constant?
http://math.ucr.edu/home/baez/physic..._of_light.html

Physics FAQ: Have physical constants changed with time?
http://math.ucr.edu/home/baez/physic...constants.html