This timeline

[Sunny0102]

The theory states that you will create a parallel universe if you time traveled, so you cannot change the past of your current timeline.

But altering your present life choices in the present will have an effect on how the future unfolds. Same as if you traveled to another time line. I am suggesting that your past in this alternate timeline may no longer be as you remember it.

This is kind of how I reasoned out why buildings can mysteriously pop into existence overnight in an empty field.

I've noticed this, as well, and have actually had a person pop up that hadn't previously existed. My changes have always occurred shortly after a Near Death Experience, though. I've had two of them in my life. Seriously made me consider the idea that when you die in your current timeline you simply skip to another timeline where you survived. Though your new timeline is slightly different and only sometimes will you even notice the change.