We all know that time can destroy anything , everything have its ending. And the time are leading everything to its ending. No matter how strong you are, you will end in time. So time is a horrible thing . No one can run away from it , but, if you got a time machine . Think about it ! What will happen next ? You can control life and death ! Or you can just run away from death!
To travel in time, you need a Tardis ! What's a Tardis? It's Time And Relative Dimension(s) In Space! If you want to know about time travel , you should first know some words !
The first thing you should know is time line. Every have a personal time line , you have your own time line ,even if you have a Tardis , you can not get through you personal time line, but you can go to other time , you can use the Tardis just walk into others Personal time line, you can know a person's future ,and you can tell him what will happen to him, or , you can make his life a mess, this is all become easily because you can travel in time.
There is a other thing -------rules! You know , if you can travel in time , then the time will become like liquid. The time become liquidity ! You can change the history ! If you bring the modern technology to 1800, and the history will change, so you must have rules for time traveler , or you will mess up the world , maybe you will meet yourself in the past , and if this happened, the time will crash , and put the world into great dangerous , so you mustn't go back to meet yourself, or , the world will be destroyed!
Time travel is wonderful, and dangerous , you can crash the world , if you are not clever enough , never travel in time!