Rongorongo

Rongorongo is a system of mysterious glyphs discovered written on various artifacts on Easter Island. Many believe they represent a lost system of writing or proto-writing and could be one of just three or four independent inventions of writing in human history.

The glyphs remain undecipherable, and their true messages — which some believe could offer hints about the perplexing collapse of the statue-building Easter Island civilization — may be lost forever.