Corn?
maize
many years
Yes: the Spanish culture as it conquered Mexico and kept it as a colony in the Americas for 500 years (1521 - 1821).
No. Both countries had very different cultures during different times.
Since the first years Mexico became a Spanish colony in the Americas (1521). That is one example of the traditions brought to Mexico by the Spanish.
Each 6 years. Ideally, next term will be on the 2012-2018 lapse.
Between 1,800 and 300 BC, many indigenous cultures matured into advanced pre-Columbian Mesoamerican civilizations such as: the Olmec, the Teotihuacan, the Maya, the Zapotec, the Mixtec, the Toltec and the Aztec, which flourished for nearly 4,000 years before the first contact with Europeans.
You mean the first permanent settlements in Mexico? Some 3500 years ago. This is known as the Pre-classic Formative Period(1500 BC - 300 AD).
It is a practice inherited from the ancient civilizations that appeared in Mexico more than 3000 years ago. Those cultures "domesticated" corn and used it as an ingredient for many dishes, including tortillas.
They have found that Native American's began to cultivate corn at least 3000 B.C. (5000 years ago), Europeans learned of this crop from the Natives c.1492+. There is no real record of how it effected the Mesoamerican cultures, and it can only be guessed that it changed their cultures like it did any other cultural group in the world.
Since some 20,000 years ago, when the first human populations began to migrate southward due to the last ice age.
About 200 years (modern nation of Mexico, that is).