https://www.abc4.com/news/digital-exclusives/sacred-groves-byu-researchers-find-ancient-sinkholes-where-mayas-grew-powerful-precious-cacao/

https://www.smithsonianmag.com/arts-culture/a-brief-history-of-chocolate-21860917/

https://www.nature.com/articles/6800156

https://www.barry-callebaut.com/en-US/group/media/press-kit/theobroma-cacao-food-gods