A minor item of detail that most time travel story tellers forget about...
Story is longer than necessary; should have ended with first incident - later parts are actually illogical. But great concept.
PS: I'm not qualified to comment on the "reasonableness" of the physics underlying the story, assuming time travel itself is reasonable!
Fact sheet.First published: 365tomorrows, 18 December 2008.
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Related: Time travel stories.