[ WP ] You wake up one morning and notice a scar on you from chest to belly button . You have no idea how it got there as you went to sleep without it . The scar is completely healed and looks aged .

Time travel is strange. 
 
 When we first started using it people were oh so afraid of paradoxes. 
 
 What if you kill your grandfather? What if you stop your parents from ever meeting. 
 
 And the biggie... if you go back to change something and are successful, would n't that remove the need to ever go back to change anything at all? 
 
 It turns out though, that none of those things are that big a deal. you can go back in time and do pretty much anything you want to. There is no Universe ending paradox, you do n't blink out of existence. Things just change and everyone is aware of the change. 
 
 Someone killed Hitler, whilst he was about ten years old it would seem. Everyone remembers him, its just, things are different now. We went to bed one night and the next day there were 15 million more Jews in the world, we had a cure for Herpes ( thanks to a Dr Goldman who passed away peacefully in his sleep in 1980 ), the first man on the moon was Japanese and strangely, Pepsi was more popular than Coke ( its a strange thing, the butterfly effect ). 
 
 We do n't know who did it though. That's the strangest thing about time travel, there seems to be some sort of self protective feature built in for the traveller. Their memory is effected. You see, on their return to the present, the traveller loses all memories from the point of making the decision to change the past, up to the actual return. It's the funniest thing. 
 
 So hear I am this morning, looking at this old scar. The last thing I remember is being told that my lung disease was too far advanced, that no treatment would work, that I should have had a transplant 5 years ago...
