I've been thinking about my next lecture, and it occurred to me that I may do something on the subject of time travel. Theoretical 'spacetime' is a combination of space and time associated with general relativity, Einstein’s theory of gravity. Spacetime has been proved by science curve in the presence of mass. So basically in principle if a 'wormhole' -a tear in spacetime- were to magically appear and one was to fly through it, it may lead to the past, future or another dimension/ universe. There is a catch though, with this theory it is impossible to go back before the wormhole was created therefore free choosing of where you go would be highly unlikely. Tell me your thoughts in the comments.