Did you know the first promotional t-shirt was printed for the release of The Wizard of Oz?
Or that most t-shirts are made of cotton, a fabric first developed by the Aztecs over 8,000 years ago?
How about this tidbit of knowledge: if you unraveled all of the yarn it takes to make a single t-shirt you would a) have enough thread to stretch 6 miles and b) no longer have a functioning t-shirt.
(We don't advise unraveling your t-shirts. Even for science.)