Conversation so far:
What is an indigenous group?
The indigenous peoples of the Americas are the pre-Columbian peoples of North, Central and South America and their descendants.
Who are The Olmecs?
The territory of modern-day Mexico was home to numerous indigenous civilizations prior to the arrival of the Spanish conquistadores: The Olmecs.
What other cultural elements did The Olmecs have?
The aspect of the Olmecs most familiar now is their artwork, particularly the aptly named colossal heads. The Olmec civilization was first defined through artifacts.

Question: Did their culture change?
Self-contained rewrite: Did The Olmec's culture change?