What If The Speed of Light is NOT CONSTANT?
What If The Speed of Light is NOT CONSTANT? PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime One of the most fundamental physics facts is that the speed of light in a vacuum is concosmologylightphysicsspeedtimeLINK