The size of the space shuttle had to comply with the size of certain train tunnels in the U.S. so it could be transported on a train during construction.

On the 7th day he rested. Probably where weeks come from. :2cents:

Well, wished "he" had rested every third day. (and for two of those three days, ya need the "weekend" time off)

the phases of the moon were around long before god was invented.

Moon phases don't give us weeks....not even months, for that matter, only menstrual cycles. :(

and tide marks....