In the future, time travel will certainly be possible. But many people may wonder, if that's true, then why don't we see people in the future world return to the present world? This question is a question for people who misunderstand time because time can stretch or shrink but cannot be reversed. Therefore, time travel is only possible by traveling forward. Which is possible in 2 forms, 1. Abbreviation time and 2. Stretch time. Abbreviation time 1. Abbreviation time : This type of travel is t...