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Stone heads with grim faces likely symbolized deities associated with war, protection, or death in various cultures. The seriousness and intensity of the expressions could convey power, authority, or a sense of awe to those who encountered them, possibly serving as guardians or focal points for religious rituals.
They probably represented a rain god.
They likely represented the Rain God.
They are believed to represent their rulers.
The most large ones are the Easter Island rock faces.
A stone head with a grim face is most usually associated with the Olmec.
, it is thought that the monuments represent portraits of powerful individual Olmec rulers.
They kept there calenders on a stone stelae a type of monument.
The civilization associated with a stone head with a grim face is the Olmec civilization. These stone heads, known as Olmec colossal heads, were created by the ancient Olmec people who lived in Mesoamerica between 1200 BCE and 400 BCE. The purpose and meaning of these sculptures are still not fully understood, but they are considered to be powerful and important representations of Olmec rulers or deities.
heads and tails
Those are the faces of Evil!
It is an idiom. It is referring to the large quantity of faces, not literally a sea of heads.