7 December 2014 - time travel 2

Someone among the Homo erectus people knew how to write an English word hundreds of thousands of years before the language existed. Someone among the Neanderthals knew how to draw an airplane. Time travel is the simplest explanation. But if so, then we face a question analogous to the Fermi Paradox: Where are they?

A. Now is boring. Once you invent psychohistory, all that’s left is to determine the boundary conditions.
B. Now is dangerous. Records clearly show that you may be caught and taken to a top-secret government lab.
C. Only a few crazies ever time travel, and they’re losers who can’t keep up with the latest cat videos.