Time travel is a very abstract concept and very difficult to explain without complex mathematical equations and concepts, which is understood by a minuscule portion of the population. I will attempt to explain the concept of time travel in a simplistic manner. We will take the example of a fictitious murder for our understanding - just to add some spice to this drab topic. Whodunnit John was found, shot dead, in his room. You are the detective to whom this problem has been presented but despite using all the known methods, you are not able to crack the case. One Mr. Albert meets you outside the scene of the crime and suggests that you travel very fast to find out who murdered John. You wonder how this escapist attitude can get you to solve the problem, but this is what he has to say: John was murdered in a well-lit room. It is clear that there was a murderer who fired the bullet from inside the room, at point-blank range, to kill John. The light from the bulbs wo