Fig.1. Maize, known as corn in the United States, comes in many varieties. This colorful array started out as a teosinte plant in Mexico about 10,000 years ago (Creative Commons: Miguel Vieira, 2011)
Maize (
Zea mays L.) is one of the most important cereal crops in the world. It originated from the wild grass teosinte,
endemic to Mexico and Central America. The evolution from small, hard seeds to a full ear of corn has captivated scientists. Unlike other grains, which evolved slowly, maize appeared rather suddenly in the archaeological record around 10,000 years ago. Although the teosinte ancestor has been accepted, the path from a warmer and wetter Mexico into the arid U.S. Southwest remained controversial. A recent study, however, found how maize traveled and adapted so quickly to a vastly different environment.