[vasama]

If time travel was possible, don't you think a time traveler would have traveled back in time to give us time travel?

[blackrock]

Isn’t it obvious?

Maybe the time traveler’s grandfather got killed in a temporal suicide attack? Thus preventing the time traveler from being born. Thus why we don’t yet have time travel.

[baja_blast]

A warp drive wouldn't result in time travel though.