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The Chicago Public Radio program, This American Life has uncovered "one of the most jealously guarded trade secrets in the world" - the original recipe for Coca-Cola, which the soda company has been hiding since John Pemberton created the stuff in 1886.
According to This American Life, a photo of the coveted recipe was published in the Atlanta Constitution-Journal back in 1979 - but nobody noticed. So what's in the fizzy elixir?
There are two parts. The first includes the usual suspects: caffeine, sugar, caramel and vanilla, but also "fluid extract of coca."
But the pop's distinctive flavour comes from the second part, an exotic concoction called "Merchandise 7X." This includes cinnamon, nutmeg oil, neroli, orange oil and coriander.
It's unlikely the revelation will make a dent in the profits of the soft drink giant. If anything, it might spur a handful of artisanal Coca-Cola makers.
Just go easy on the coriander, folks.
Zosia Bielski