Hey, Chocolate Lovers: New Study Traces Complex Origins of Cacao

Scientists are getting a better taste of the early history of the domestication and use of cacao—the source of chocolate—thanks to residues detected on a batch of ancient ceramics from South and Central America. Using evidence from these artifacts, the researchers traced the rapid spread of cacao through trade routes after its initial domestication more than five millennia ago in Ecuador. They showed cacao’s dispersal to South America’s northwestern Pacific coast and later into Central America until it eventually reached Mexico 1,500 years later.