Balsas teosinte (IMAGE) Temple University Caption Balsas teosinte, a large wild grass that grows in the Central Balsas River Valley of Mexico. Maize domesticated from Balsas teosinte more than 8,700 years ago. Credit Anthony Ranere/Temple University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.