[QUOTE=ebaines;3547130]We don't - the furthest object ever observed (to date) is about 13.4 billion light years away. At that distance the red shift factor is 11.9, meaning:
See
List of the most distant astronomical objects - Wikipedia, the free encyclopedia
Supernovae, black holes,GRBs,etc. stratified through time. It is not necessary to postulate time as a fourth dimension: I can represent an event as a scalar. For ease with calculatin the interval between events a complex plane can be utilized where time is the imaginay ordinate; thus using simple algebra. Multiple dimensions are objects for using arcane and obfuscating mathematics. Instead of multiple dimensions coordinates are just functional parameters. The BBT is metaphysical nonsense. It has nothing to do with religion; but is an attempt to circumvent ridiculous claims relative to origin of the universe. Ultimately the question reduces to
"from where did the fist-cause come".