I love reading old Space science books. From the 1950 when we knew almost nothing for certain about the Moon, through the 1960s and early 1970s when the idea of continued production of the Saturn V meant lots of great ideas from the Apollo Applications Project. It is a pity that not only was production closed down, but the last two Saturn Vs never even flew. Some of the plans for what would have followed the first landings were amazing.
I also love the idea of almost identical parallel Universes with another version of me. I just hope he is doing better than I am! :rofl: - I think that Stephen Hawkins is truly amazing. It's frightening to think that, had he been born just a couple of generations ago, that wonderful mind would have been trapped with no way of expressing himself.
It reminds me of one of my favourite episodes of the sci-fi comedy Red Dwarf. The four crew members go back in time and space to stock up on curry sauce from 20th Century Earth. Unfortunately they mistakenly materialise on the 6th floor of a Book Depository over looking Dealey Plazza, Dallas at around 12:30 on the 22nd November 1963. In doing so, they startle a man aiming a rifle out of the window, causing his shot to miss. The change of the time line leads to disaster for the United States over the following years as the Presidents affairs become public knowledge. The episodes ends with the crew persuading President Kennedy to come back in time with them to put things right. The President takes the shot that returns the time line how it was, from a small grass covered hill or knoll, before vanishing as he no longer exists in our time frame.