We adore a hidden design secret, and while this usually applies to logos, sometimes something special pops up elsewhere. This one has been hiding under our noses for, well, forever – and it's currently blowing minds. May we present the secret behind the humble playing card, the Eight of Diamonds?
A Twitter user (below) has asked how old users were when they realised the Eight of Diamonds contains a secret number '8' and the answer from many was: today years old. It's as good as the treats hidden inside the world's best logos.
