Behold the power of Wikipedia
On a whim, I bothered looking up sandwich on Wikipedia, just to see what I could see...and lo!, I saw that it was good, for they've actually got a section on the origins and history of the sandwich (my interpretation, it seems, was a little off). Is there any question Wikipedia CAN'T answer?
How many licks does it take to get to the Tootsie-Roll center of a Tootsie-Pop? Wikipedia knows.
How much wood could a woodchuck chuck if a woodchuck could chuck wood? Oh, Wikipedia's got an answer.
Who's the man now, dog? Okay, they've got nothing on that.