Now, try to follow. Thomas and I were watching a show about time travel on the history channel. The guy explaining how it would work was equating it to a cup of coffee and using Einstein's famous equation E=MC^2. Light=Matter=gravity. If you stir it around you can create a loop for time travel. Then he placed a coffee bean in the cup of swirling coffee. The bean swirled around just as expected. The bean representing information/sub-atomic particles/potentially people could travel through time with the right amount of gravity. The scientists would start with sending information. The visual they used on the show as they talked about how information could help prevent some of the major devastation, was a fallen city in reverse, just like it never happened. Thomas looked at me and said, "Mom, I told you we needed more hot chocolate. We should always have some so it could save the world."