On a visit to MIT in Boston i picked up a copy of one of the Uni newspapers. A letter in the paper refered back to a conference organised there in 2005 - a conference for time travellers. The idea was that if time travel is invented in the future - they could come pop back to this conference and explain how they did it!!
No one turned up (well - not from the future anyway).
Several possible explainations were put forward - the most obvious being that "time travel is not possibe"! Sounds reasonable! Another is that it is possible but clearly we wipe ourselves off the face of the planet before we make it happen. Sounds scary! Yet another reason was all about multiple universes. Hmmm! The best answer: "in the future they knew about this and thought it sounded terribly dull!" That one gets my vote!!
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