When you do time travel, do you really go to a different dimension, or do you just change your own dimension? We can't assume just because you change something in your dimension, you'll go back to a different dimension where it never X never happened or Z did happen, you might, actually be in...
1. Camera - Don't care if it's a phone camera, but just a camera in general
2. Time Machine - So I could get back (Duh)
3. 1800's clothing - To fit in
4. List of laws that we discovered (ex. E²=(mc²)²+(pc)²) - So I can hand them to a scientist for him to "discover"
5. Microscope - If the...
To be fair, how can you make UFO/Alien style technology if we have no clue what alien style technology. For all we know everything we know about physics could be wrong, and their looking at us like "What Idiots" with their technology that would break our "laws" of physics
I have read a few of his readings, and even for that time, he was being EXTREMELY vague. It was as if I said "He will shoot a white bird in the sky at exactly 3' o clock, in 400 years that's practically guaranteed to happen.