Each Olmec head is unique, leading archeologists to believe they may have been made in honor of ancient Mesoamerican rulers.

The map is a 13 by 8-centimetre tablet depicting ... Shedding light on humanity's ancient lineage mysteries Ancient Olmec portal returns to Mexico after decades abroad ...

The ancient artifact had been damaged ... Once an important site on the Olmec map, Chalcatzingo is known for its enormous stone heads, which are believed to represent their rulers.