Is the cat out of the bag??... One of the most closely guarded trade secrets in the history of commerce may be a secret no more: NPR's "This American Life" thinks it has found the exact recipe for the world's most popular soft drink in a 1979 newspaper article.

According to the show's host, Ira Glass, the drink's secret flavoring component, which was created by pharmacist John Pemberton in 1886, is something called "Merchandise 7X."