Engineers at Princeton and Stanford just solved a very important problem plaguing our society.

They ran a bunch of tests to figure out what makes the cream stick to one side of the Oreo when you twist it open.

Getty Images

Their research found it must have something to do with manufacturing, because the cream always sticks to the same side of every cookie in a package. It doesn't matter how you twist or pull them.

If you want to win a bet by predicting the side the cream will stick to, just test one Oreo in a pack, and then bet accordingly.

Read more at Gizmodo.