Ok, we all know the speed of light (well actually I don't but I know I can google it) but the big question in my mind is the one no one seems to be asking. We are all focused on understanding the creation of the universe when in fact we ought to be asking ourselves what exactly our universe is existing in.

My current theory is that the universe is expanding into time and, using that logice, I must exists many times over, just with billions of years between each existence. Am I right about this???

Me and my twin develop a rocket that can fly through space near the speed of light... He gets in and takes off and his rocket approaches C. From my perspective time slows down for him, he ages slower than me on earth, and when he returns more time has passed for me.  But from his perspective earth has taken off at near C away from him, so shouldn't he see time slow for me.  And from his perspective, when earth returns shouldn't he have aged more rapidly than me? If its all relative, what is the mechanism that decides who ages, when both brothers see the exact same scenario from different points of view?

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Imagine that you are suspended in empty space (so there is no gravity) and you can see two stars that are three light years distant and one light year apart. you could point from one to the other in a matter of seconds but suppose you were holding an incredibly long pole that reached almost all the way to one of the stars but not far enough to be affected by it's gravity. Surely it would still take seconds for you to move your hand (and the pole as well) between the two stars but the end of the pole would have to be traveling faster than the speed of light for it to move between them so quickly. However, according to Einstein's theories of relativity nothing can travel faster than the speed of light so what would happen?

It is already possible to stop light in extremely low temperature BEC (Bose- Einstein Condensate) But, if i took say, a space ship and travelled at 300,000 meters per second (The speed of light in a vacuum), relative to Earth, and mounted a light on the back, would the light travelling in the opposite direction to the ship, be travelling at the same speed as the Earth?

SInce light slows down in mediums, would it ever be possible to slow light down to a speed where a human could observe its movement?

If time slows for the observer as they approach the speed of light, would it stop all together if you actually attained light speed, effectively resulting in instantanious travel anywhere in the universe? What if you exceeded it? does time actually move backward or would the "direction" of time travel be dependant on your direction of movement?

if your in a car moving at 60mph and you turn the headlights on does that mean that the light from the headlights is moving 60mph faster than the speed of light

Regardless of whether we travel at the speed of light or not, should our cells not biologically age and decay as per normal? Do we not have an internal biological clock that keeps ticking? Is Einstein proposing that our body will suffer less aging effects when travelling at the speed of light? Someone please help explain this....