There are 10 rules of time travel. Whatever natural principles the creator of imaginary worlds chooses to follow, they must not permit true paradoxes.
We constantly advance one second into the future at a constant rate.
Traveling backward in time would not be feasible if Isaac Newton’s theory of absolute space and time had been an accurate representation of nature.
Similar to traveling through space, traveling through time involves moving along a predetermined path that the universe has presumably set up to help you arrive at a previous point in time.
Clocks and other objects will all experience time exactly the same as you do if you travel through time and bring them with you.
Sadly, a black hole wouldn’t spit you out at a later period if you fell into one. It wouldn’t even spit you out; instead, it would eat you whole and gain a little bit of weight in the process.
People seek to travel back in time and alter the past via time travel devices. The past is already past and cannot be changed.
The least realistic time-travel movie of all time might be Back to the Future. When Marty McFly changes the past violating Rule 6, the future “instantaneously” changes.
If you build a time machine where none previously existed, future travelers may be able to return to that period, but nothing can assist you in return to moments before the machine was established.
Parallel universes, such as those considered in the many-worlds interpretation of quantum mechanics could create potential loopholes for some of the above laws.
If you have reliable records of making some poor decisions about your social life in high school, those decisions were made and cannot be reversed.