Chocolate lowland climate in the narrow band of latitudes where cacao is grown (20 degrees north and south of the equator), the commercial company Mars, Incorporated and the University of California, Berkeley are conducting genomic research in 2017–18 to improve the survivability of cacao plants in hot climates. Chocolate is made from cocoa beans, the dried and fermented seeds of the cacao tree ("Theobroma cacao"), a small, 4–8 m tall (15–26 ft tall) evergreen tree native to the deep tropical region of the Americas. Recent genetic studies suggest the most common genotype of the plant originated in the Amazon basin and
Theobroma bicolor are used as planters and containers. The pulp which surrounds the seeds can be eaten fresh, and has a sweet, mild taste. When the fruit is ripe, it naturally detaches from the tree branches and falls to the ground; the general method of harvesting is collecting the fallen fruit. Mayas placed a high value on the buttery foam crowning beverages of cacao and maize, according to descriptions from the time of the "Conquista", and it appears that a thick, stable foam can be produced using fruits of "T. bicolor" as source of cacao, but not with "T. cacao" fruits. "Moniliophthora