"""TIME"""

Past-present-future.This is the normal sequence.But why its opposite is not possible!!..I mean future-present-past.

•   Present is an intermediate state and is unstable,it either leads to past or to the future,as like an chemical reaction. 

• In our world the reaction preceeds forward that is leads to future.There must be some other world where these reaction occurs backwards,otherwise there will not be an equilibrium in the space-time period.If we can connect that world then we can might get our past back.But it cannot be changed as it has already occured in both the places.