A mysterious ancient stone mask from Mexico has spoken but apparently only to say that its people's written language remains undeciphered. BYU's Stephen Houston holds a copy of ancient script from Mexico. He disagrees with claims that "Teo Mask" words have been deciphered.Stuart Johnson, Deseret Morning News A study by Brigham Young University archaeologist Stephen Houston and his colleague from Yale University, Michael D. Coe, say the mask disproves earlier claims that the language had been cracked. Their paper is to be published in "Mexicon," a journal about news and research from Mesoamerica. The title is "Has Isthmian Writing Been...