Quote Originally Posted by hillbilly View Post
A must read.

STEPHEN HAWKING: How to build a time machine | Mail Online
Yes, very interesting read.

Unfortunately or rather fortunately he says in one paragraph:

Any kind of time travel to the past through wormholes or any other method is probably impossible, otherwise paradoxes would occur. So sadly, it looks like time travel to the past is never going to happen. A disappointment for dinosaur hunters and a relief for historians.