A particle existing at the speed of light could travel through time as we travel through space. The problem is and always has been that anything with mass cannot reach the speed of light, so for a thing with mass to travel c it would have to essentially de-materialize into pure energy and...
I use Facebook to engage my peers and fellow students in philosophical and theological discussions and debates. It is helpful in that way, and that makes up 90% or more of my FB time.