So far it appears that light speed is a true limit, however, the mathematics show there are ways to bend the rules. In fact, Dr. Sonny White who works for Eagleworks which is a small division of NASA has been experimenting the possibility of bending space-time. In this scenario, the ship itself doesn't actually move in the traditional sense hence observing the lightspeed limitation, but expands and contracts space around the ship to move it along at FTL speeds. The math supports up to about 10 times the speed of light if I remember correctly. Very complicated, but cool stuff. All that said, this still isn't the case for aliens visiting us even if it is possible and other intelligent life has figured it out.
Then we have quantum entanglement which allows us to entangle two atoms and they will switch states simultaneously regardless of the distance between them which begs the question as to how are they communicating over vast distances instantaneously. Would make great communication devices as instantaneous communication with deep space probes or ships would have advantages, but what if more can be sent via the same mechanism? As Einstein said, spooky stuff.
When it comes to the whole who created the creator or what existed before the big bang, I've always had trouble, but then you read something like this where we have come up with a clock that will tell time even after the universe is destroyed. Huh?
http://www.livescience.com/23419-eternal-clock-space-time-crystal.html
We will find out the answer regarding the big bang soon enough assuming the collider at CERN is successful. If it turns out the big bang didn't happen, we have a lot of reworking to do, but that's how science works.