As a side note, some see the 2,000 year difference between the time of cultivation of wheat and maize as one of the two reasons (horses being the other reason) that when the Spanish came to America, Indian culture was 1,000 to 2,000 years behind European culture.
Kwa nyongeza, watu wengine wanaona tofauti ya miaka 2,000 kati ya muda wa kupanda ngano na mahindi kama moja ya sababu mbili za (farasi wakiwa sababu nyingine) kwamba Wahispania walipokuja Marekani, utamaduni wa kihindi ulikuwa na miaka 1,000 hadi 2,000 nyuma ya ule wa Ulaya.