Greenhouse 'time machine' sheds light on corn domestication

A grass called teosinte is thought to be the ancestor of corn, but it doesn't look much like corn at all. Scientists were surprised to find that teosinte planted in growth chambers under climate conditions that simulate the environment 10,000 to 12,000 years ago looks more like corn. This may help to explain why early farmers chose to cultivate teosinte and lends support to the idea that teosinte was domesticated to become one of the most important staple crops in the world.

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