An archaeological find announced in Mexico is attracting notice because it may shed light on an Indigenous culture from about 1,400 years ago that remains poorly understood. Near Coatepec in Veracruz, the team found an enormous stone platform, a carved stela, and what appear to be ritual offerings, including charred corn. What happened? Near Coatepec on Mexico's eastern side, archaeologists in Veracruz identified remains that seem to belong to a…