Time travel does contradict any possible and plausible theories quantum physicists have come up with (and pretty much every genius in the field has looked into that).
And I don't think mankind is getting any smarter....so fat chance.
Duffy wrote:
I think future man fucks up the planet from over population but gains the technology to travel back in time.
So we devise a plan to send billions back in time to populate the planet "before man existed" but somebody fucked up the date and sent us back to the dinasour times.
The people freaked out and nuked all the dinos.
Or there was a war or something. Maybe a war against sleestacks.