Time: World Lines and the Block Universe

If you consider spacetime a single unified thing comprised of both space and time (and they do go well very well, mathematically speaking), then you could see your entire life — everywhere you go, everyone you meet — in the form of a wiggly line stretching against a backdrop of the other three dimensions. In fact, every molecule in the universe, including those that make up your body for a part of their billion year journey would be captured in this block. From this particular dimension, called the Block Universe, time does not exist, other than as these trails encased across stretches of space, often known as world lines.
Technique

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