Fucking epic, time dilation is one of my favorite concepts and you wrote this up nicely. The workings of our universe are absolutely crazy, much stranger then any fiction novel.

Edit to expand: causality is also a very facinating topic. Did you know we have not made a law stating there can't be an effect without a cause? Its pretty mind boggling actually but there are only two possibilities here. Either there can be an effect without a cause, or all effects have a cause, simply because the universe exists forever. Like an infinite series of falling dominoes that nobody tipped over.

Both options seem equally absurd : /