Sort of pursuant to this, I was watching Carl Sagan's COSMOS series again a little while ago, and at a certain point he noted that because of relativity, if you left the earth (which is near the rim of the galaxy) on a ship which travelled near (but obviously not at) the speed of light intending to cross the galaxy, this would take hundreds of millions of years earth time because the galaxy is hundreds millions of light-years across.
But, because of relativity, the amount of time that passed on the ship (whose independent mass is infinitisimal) could be as little as 57 years!!! To the other side of the galaxy!!!
They are already here for chrissakes!!! Haha -- seriously tho, only a machine could travel that fast, I think the biology inside will suffer.
ps. I actually saw an article somewhere about God's 3D game engine and it wasn't DirectX...having voted all 16 times now, I think everyone should just give up and acknowledge this chaos.