A spear is unearthed from Inca ruins on a hillside in Peru. Although the jade spearhead originated 3,000 miles away and 1400 years in the past, carvings on the shaft unite Mexican and Peruvian images with a more recent time period. But more remarkable is the strange dialect now issuing from the resident archaeologist's mouth. Is it coincidence that, in Mexico, two-year-old K'iin K'aay is suddenly speaking the same language used by the archaeologist?...