Yes, and 300 years ago there was no Universal speed limit. Hawking has stated that he has no theoretical objections to time travel, but thinks that there is pro

Yes, and 300 years ago there was no Universal speed limit. Hawking has stated that he has no theoretical objections to time travel, but thinks that there is probably a theoretical reason for why it isn't, he just doesn't know what that might be. Let's not forget, the brightest minds in the world, self admittedly, don't know that much about how the Universe actually works. There are theoretical objections to time travel.