I was reading September’s issue of Real Simple magazine the other day, and came across an interesting bit of trivia: denim and jean were originally different fabrics. Both materials were made of cotton, but denim "was a blend of colored and white threads, while the finer jean was woven from threads of the same color" (p. 110). (Click here for more info from Wikipedia.) In 1873, Levi Strauss made the first "blue jeans" out of denim because it was a sturdier material than jean. Who knew?