YOU may have 20/20 vision if you can spot the odd frowny face out in this optical puzzle. Try not to be deterred by all the grumpy emojis as you find the one slightly different emoji in the ...

A smiley face isn't always simply a smiley face. Emoji are set to get more complicated, with Apple (AAPL) this week releasing a dozen new emoji that will appear on its devices later this year ...