By chaining the selectors together, he was able to encode invisible messages inside an emoji (or any other Unicode character) ...

Of the six billion emoji that are sent globally every day, around 70% are emotion based – for example, smiley face, love hearts. A smaller proportion of the emoji sent are sad expressions.

Over time, emoji meanings have become subjective depending on a message's context and wider cultural trends. Which shaking smiley face should you use? Is there a difference between each different ...