[Consort]

If time travel is possible, then it already exists. Once it is developed in any time period, past, present or future, it is available to all time periods via the time travelers. It is not time-dependent.

[Ichneumon]

If time travel is possible, then it already exists. Once it is developed in any time period, past, present or future, it is available to all time periods via the time travelers. It is not time-dependent.

Not necessarily. One theoretical type of time travel only works if you have a "receiving station" operating in the "destination" timeframe. So from any point in the future you'd be able to travel back into time only as far as the first invention of time travel, but no further.

[greydog]

Makes me think of the movie Slaughterhouse-Five. Anybody heard where Paul Lezaro is?