Archaeologists
have unearthed thousands of ancient paintings on the walls of caves and
ravines in the mountains of northeastern Mexico, providing a look from a
time before Spanish rule. http://bit.ly/ZqGwHL
Researchers think this rock art was created by pre-Hispanic groups in Mexico's northeastern state of Tamaulipas.
Researchers think this rock art was created by pre-Hispanic groups in Mexico's northeastern state of Tamaulipas.
