So my physics professor once gave an example of time travel using a train, something about the train being stretched way out and the person standing on top of the train getting really really tall. Or something. As you can see I don't quite remember
I'm wondering if this is a common example when discussing time travel, or if this is something my prof. just pulled out of his hat? And if it is something you've heard of, can you re-explain it for me? It was rather cool, if I remember correctly.
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