Outnerding myself again (this time by request!)

Things I have noticed on Battlestar Galactica that are unquestionably earthling in origin:

1. Laura Roslin uses the phrase "pound of flesh" (and I totally forget why--but it was apt), which is from Shakespeare's play The Merchant of Venice.
2. Dr. Cottle, astonished to learn Dr. Robert is refusing to give the Sagittarons medicine, demands to know what happened to "First, do no harm" which is widely thought to be part of the Hippocratic Oath, but is not. It is, however, attributed to Hippocrates, who came from Earth.
3. The Cylon siren song is "All Along the Watchtower"! That is even more unmistakably from Earth than the other two! (Unless Bob Dylan is a Cylon. Then all bets are off!)
   
4. Baltar uses the phrase "shuffle off this mortal coil" in one of his wireless broadcasts. That is from Hamlet.
   

Anyway, I mostly figure that all the signposts they find and interpret as the 13th tribe's path from Kobol to Earth are actually signposts of the Earthlings leaving Earth for Kobol--leaving markers along the way in case anyone needs to go back.