Anthropology

One can only speculate how they knew the non-existent English alphabet and concocted a sentence using each letter once and once only! It roughly translates to "Mystic Islamic Saint-Vampire, whoop the brown cow whammy."

Linguists were also baffled by a sentence on the opposite side: Sit on a potato pan Otis.
Chief Linguist Simon N. Garfinkel said, "These sentences are a conundrum. I don't know if I should read it left to right or right to left!"