#10: RongorongoConsidered the other "Easter Island mystery," Rongorongo is the hieroglyphic script used by the region's early inhabitants. While no other neighboring oceanic people possessed a written language, Rongorongo appeared mysteriously in the 1700s. However, the language was lost--along with the best hopes for deciphering it--after early European colonizers banned it because of ties to the islanders' pagan roots.
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