Kind of mind boggling when you try to conceive what existance really is. Never heard the "i" explanation before, just think if you went at a constant speed of our fastest shuttle. It would still take nearly a 1000 years to reach alpha centuri. Even if we tried using a shuttle to reach the nearest star, the amount of fuel it would take is more than the amount of matter in the universe. Even if you think of the speed of light, we are looking at the farthest galaxies as they were more than 10 billion years ago. Those galaxies are so far away it takes 10 billion years for their light to reach us. It takes 4 minutes for our sun's light to reach us. Contiplating the galaxy is like an ant contiplating the sears tower times a trillion. Don't think to hard on it though.