Radio programs used to be longer and required people's undivided attention
It was changed by the migration of Aryans. They were called Indo-Aryans.
Answer:
700 BC–1521 AD (2,500 years ago)
Explanation:
The Zapotec civilization (Be'ena'a (Zapotec) "The People" c. 700 BC–1521 AD) was an indigenous pre-Columbian civilization that flourished in the Valley of Oaxaca in Mesoamerica. Archaeological evidence shows that their culture originated at least 2,500 years ago.
The Olmec civilization emerged in the lowlands along the southwestern edge of the gulf of mexico around 3000 years ago.
The first signs of complex society in Mesoamerica were the Olmecs who were an ancient Pre-Colombian civilization living in the tropical lowlands of south-central Mexico. They were the first major civilization in Mexico.