Archaeologists believe a newly discovered 1,100-year-old tomb in Mexico may hold clues to finally understanding the decline of the Mayan empire. The ancient tomb was discovered at the site of the Mayan city of Tonina in Mexico's state of Chiapas, on the border with Guatemala. Experts have dated the find - which included a stone sarcophagus, ceramics and human bones - to between 840 and 900 AD. - read more "This is very interesting, because we are going to see from the bones who these peop...