There is proof of human existence in Mexico since 20,000 years BC. The remains of a human corpse were found beside those of a mammoth in Tepexpan, north of the Valley of Mexico. Tests on the remains verified that they dated approximately 10,000 years BC. There is also proof that Agriculture began from the year 3,000 BC. The American continent was isolated during many centuries, which explains why this civilization is so original. The people who populated Northern …showed first 75 words of 2495 total…

…showed last 75 words of 2495 total…