If you went back in time and met your teenage parents, you could not split them up and prevent your birth—even if you wanted to, a new quantum model has stated.
Researchers speculate that time travel can occur within a kind of feedback loop where backwards movement is possible, but only in a way that is "complementary" to the present.
In other words, you can pop back in time and have a look around, but you cannot do anything that will alter the present you left behind.
Hands up who thinks this explains anything.
The present you leave behind includes a (continuous) past where you didn't go back in time. So, as of, say, a week last Thursday, you had never gone back in time. So how come this past that you go back to doesn't have to be "complementary" with a week last Thursday too? But, to be complimentary with a week last Thursday's history, you can't have gone back in time… HANG ON, WHY AM I EVEN DISCUSSING THIS NONSENSE?
Can't wait! See you behind the sofa!