Few foods make people weak in the knees the way chocolate can. Capitalizing on the addictive cocoa confectionary has been huge business for two companies who have been neck-and-neck for supremacy for almost a century – Mars and Hershey's. Whether it was forming entire towns dedicated to chocolate production or becoming the snack of choice for a popular extra terrestrial, these bars, bites, duds, kisses, pieces and patties continue to be irresistible...and very lucrative.
