Ancient finding suggests Peruvians could have been making tortillas 4,000 years ago.
Archaeologists have found the oldest evidence so far of agriculture in the Andes. The discovery shows that ancient Peruvians were growing and eating maize some 4,000 years ago - more than a millennium earlier than previous records had suggested.
Maize was originally cultivated in Mexico, and archaeologists have evidence that the crop was grown as early as 7,000 years ago in Ecuador. But they had previously not known how quickly the practice spread south into the Andes.