Is Time Travel Really Possible?

Tiket: Are we alone in the universe? I don't think so. Can we ever reach them, get a glimpse of them? Who knows. So let's see how it goes. Hopefully we will find something, and hopefully that well not be too dangerous, eh? Right? Ok, dark lord. The dark lord is here. All right. Is time travel really possible? Can you explain the grandfather paradox and jesprit by says accord? What, according to theoretical physicists, are the possible ways to travel back in time, other than wormhold concept,. In which there's a requirement of cosmic strings and negative inegative energy?"