advances in science and technology. there us nothing quite as stubborn as superstition. even today in the twenty-first century, people still believe in bad luck and omens. in the future, people may work in space station or travel the universe in starships, but there probably won't be a " starbase 13" or a rocket liftoff on friday the thirteenth. A seventh voyage will be a good one, and the third time around will still be lucky.