Do you ever wonder how far along we are in our understanding of science?

Pure Energy said
Remember e=mc2 is only a theory. A theory is something that isn't proven as a fact; it's just our best guess why things happen and how things will happen in the future. A basic assumptions in Einstein's theory is the speed of light is an absolute constant (is it absolutely true; who knows? is it possible there's more to the explanation that may be missing, etc.). Same with the theory of gravity...we know the apples fall from the tree and explain it with the theory of gravity. We're pretty confident about it as an explanation, but don't know for a fact that the current theories and related equations are all there is to it.

Additionally, in your example of travel you're limiting yourself to our current understanding of time and space. Time is another arena we know nothing about. We see time as a linear concept; who knows...there may be other ways to conceptualize the concept of time.

No, it is not a theory it is a fact, ok. Until you come up with a better "theory" and prove it in a lab, the onus is on you. We can't travel faster then the speed of light. It is simply a matter of fact. Energy = matter times the speed of light squared is one of the most beautiful equations ever thought up. It basically means that energy is mass and vive versa. When you hold a rock in your hand, you are holding energy. When an atom splits, it releases a certain amount of energy that can be determined by using certain mathematical principals. The speed of light is a constant but some very smart people think it might be getting faster or slower depending how fast the universe is expanding.

As for your understanding of the universe, I can't help you with that. I will say this man has come leaps and bounds in just the past 30 years of understanding our universe. In fact, the term "universe" is out dated it is generally assumed we exist in a multiverse and there are as many "universes" as they are grains of sand on the earth, probably more. Each universe has different sets of physics that rule. If you want to go to another universe, build a space ship, head toward the supermassive blackhole that sits in middle of our galaxy and jump right in.

If you really want to start to freak out on this stuff you should read more about M theory, good luck understanding it though. I doubt there is 1000 people in the world that understands this stuff.