Yeah, I also saw the documentary, it was pretty long, lasted for 45 minutes.
Anyhow, it is very possible, what you said, killing your ancestors, you would not die if you travel back. Because, you travel in presence, everything happens in presence for you, All you once knew, would change if you go back, maybe another family or so, who knows, or you might not exist if you go back, but you do however.
You can use everything in the future in the past if you wish, that is how i see it.
__________________
Hmmm.....
|