Without written history there would be no sense of how long or what time these events happened, so I'd say that Ganj has a point there...

And in Astral Projection, MudFu, you're not moving back or fowards though time or anything, and time isn't at a stand still. It's just a transcendence of time... like on Salvia, people often get deja vu and I think it's possibly recalling things from your childhood... this is a transcendence of time because you are experiencing this time distortion without actually moving at all. And on other psychadelics, this time dilation people experience might just be your mind comprehending things outside of time... a minute could seem like a lifetime and the 4 hour trip can seem like less time then an episode of Seinfeld. It's why people get hung up in thought loops... it's why the years go fast and the days go slow... because time is an illusion. As someone here once said, (I think it was beachguy or something) time only exists because no one person can experience everything at once.