I think that we’re overlooking something here. One of the most fundamental and revered laws of physics is the conservation of mass. If one could travel back to Jan. 1, 1812; they would be injecting additional mass into the universe of 1812. This isn’t going to happen.

I am just as enamored by Sci-Fi lore as anyone else. The notion of time travel to the past is romantic, mysterious, paradoxical… Fortunately, we don’t have to worry about the safety of our grandfathers. The past is not changeable because the laws of physics prohibit it… lucky us.

Good atmosphere and good conversation...that's the best.