According to an international team of scientists who have sequenced the genome of a 5,310-year-old maize cob from the Tehuacan Valley, the maize (Zea mays) grown in central Mexico more than five millennia ago was genetically more similar to modern maize than to its wild counterpart. A 5,310-year-old maize cob from Tehuacan, Mexico. Image credit: Bruce Smith. Scientists have long debated how and why ancient people domesticated maize, in large part...
