<font color="yellow">I'm curious how all this works. In life everything has a center. The earth's shell doesn't, but only an idiot would say that the earth has no center; it does without question. <br /></font><br />Yes, it does… but the center isn’t in the 2 dimension surface, it is in a 3rd dimension.<br /><font color="yellow"><br />So if everything we know has a center (and I challenge anyone here to show something that doesn't), why do we assume the universe doesn't? Is it simply that it's conveniently enigmatic to think so? <br /></font><br />If the universe is finite but boundless, you need a 4th dimension to find a center, there is no center in the 3d surface.<br /><br />Let’s start from 1d:<br />In 1d you have only line segments, and each segment must have a center. But if you put together both ends of a segment you have a boundless 1d continuum. <br />You don’t have a center of the segment, but you can find the center of the 2d shape it creates.<br /><br />In 2d you can have many bounded shapes, and all of them must have a center, you cannot find a 2d shape without a center. But if you warp a 2d shape in a 3d space and close its bounds, your shape become the 2d surface of a 3d solid, and you need at least a 3rd dimension to find its center…<br /><br />In 3d you can do the same thing…<br />You can have many 3d solids, all of them with a center, but if you warp one of them in 4d, and close its bounds you can have a 4d thing whose surface is a limited, but boundless 3d space.<br />You will need a 4th dimension to find its center…<br /><br />Are you a 3d guy and cannot see in 4 dimensions?<br />well… I am one too… <img src="/images/icons/smile.gif" /><br />I cannot see 4d things but the math seems to work… so I believe it.<br /><font color="yellow"><br />Remember that for thousands and thousands of years the earth was the center of the solar system and universe (and was also square). Why is it so difficult to see the universe as being similar to practically every</font>