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Old 03-27-2002   #2 (permalink)
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Tormod
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Well, Stephen Hawking has a neat answer to this one: he says that one reason may be that it will not be possible to travel further back in time than to the date when the time machine you travel with was created.

For example: If I create a time machine today, it will always be possible to travel back and forth in this time machine - but not further back than today.

How far you could go in the other direction, though, I know nothing about. Perhaps until the day it is taken in by the feds due to tax evasion on behalf of the owner? ("We have uncovered an anomaly in your bank account - it has grown by $1 per day for 40,000 years and we would like to take a closer look at this strange machine of yours."). But then he can quickly enter the machine, go back and fix his problems...

Tormod


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