Punctuation is said to originate almost 5000 years after the invention of the written word, with the Mesha Stele in 840 BCE, a stone inscribed for King Mesha of Moab in present-day Jordan. The text of the stone features full stops or periods between each word and vertical strokes to mark the ends of sections.
Pearson, the global education company, use the interrobang as their symbol. Maybe they know something we don't.