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Dec22-10, 09:05 PM
This isn't that complicated and you don't need to resort to $10 words to understand it. Let's say you were born on the Earth, hence you are made of matter that came from the matter on the Earth. That matter is a set of molecules we'll call set A. This set of molecules makes up the landscape before you were born, becomes your body at some point in time, and goes back to becoming the landscape after you die.
Take that set of molecules, A, back in time to before you were born, back to when that set of molecules made up the landscape. We now have 2 sets of A molecules at that point in time.
If you have a firm grasp on general relativity, how would you comment articles such as this:
which suggests at least the geometrical possibility of time travel?