lots of books and films about people travelling to the future or the past.
Albert Einstein taught us faster you go, the slower time passes
travel at speed close 300.000 kilometers a second
some scientists never possible either but if we manage to create fast enough, there is one problem: probably never return to his own time
well-known paradox in time travel: back in time to kill your grandfather, who still hasn’t met your grandmother, the problem here is that if you kill your grandfather then you could never exist. That would make it impossible to travel back in time at all.
if able to, guaranteed changed something, small changes lead big changes