Some American continent crops that were domesticated a while ago:
Maize ~9,000 years ago
Potatoes ~8,000
Quinoa ~ 7,000
Tomatoes ~7,000
Avocados ~ 6,000
Chili peppers ~ 6,000
Sweet potatoes ~5,000
Cacao ~ 4,000
Pumpkins ~9,000
Common beans ~8,000
Peanuts ∼8,000 years ago
