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

Cacao beans are seen at "Minimal - Bean to Bar Chocolate - " shop, manufacturer that oversees the chocolate production from sourcing the cacao beans to making the chocolate bars in the shop, in Tokyo, Japan July 20, 2017. (Reuters)
Cacao beans are seen at "Minimal - Bean to Bar Chocolate - " shop, manufacturer that oversees the chocolate production from sourcing the cacao beans to making the chocolate bars in the shop, in Tokyo, Japan July 20, 2017. (Reuters)
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Hey, Chocolate Lovers: New Study Traces Complex Origins of Cacao

Cacao beans are seen at "Minimal - Bean to Bar Chocolate - " shop, manufacturer that oversees the chocolate production from sourcing the cacao beans to making the chocolate bars in the shop, in Tokyo, Japan July 20, 2017. (Reuters)
Cacao beans are seen at "Minimal - Bean to Bar Chocolate - " shop, manufacturer that oversees the chocolate production from sourcing the cacao beans to making the chocolate bars in the shop, in Tokyo, Japan July 20, 2017. (Reuters)

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.

A tropical evergreen tree called Theobroma cacao bears large, oval pods containing the bean-like cacao seeds that today are roasted and turned into cocoa and multitudes of chocolate confections. In these ancient times, cacao was consumed as a beverage or an ingredient with other foods.

The researchers tested more than 300 pre-Columbian ceramics spanning nearly 6,000 years for traces of cacao DNA and three chemical compounds related to it, including caffeine. They discovered cacao evidence on about 30% of them. The findings indicate cacao products were used more widely among these ancient cultures than previously known.

The ceramics themselves offered an artistic glimpse at the cultures, some displaying wondrous anthropomorphic designs.

A study published in 2018 revealed the domestication and use of cacao beginning about 5,300 years ago in Ecuador, based on evidence from ceramics at the Santa Ana-La Florida archeological site. The new study builds on that by tracking cacao's spread through 19 pre-Columbian cultures. Some of the earliest use was shown through ceramics made by the Valdivia culture in Ecuador and Puerto Hormiga culture in Colombia.

The ancient DNA found on the ceramics also indicated that various cultures cross-bred cacao trees to adapt to new environments.

"The first steps of cacao domestication correspond to a more complex process than the one we had previously hypothesized," said molecular geneticist Claire Lanaud from the AGAP unit of CIRAD, a French agricultural research center for international development, lead author of the study published on Thursday in the journal Scientific Reports.

"We were not at all aware of such an important domestication of cacao trees all along the Pacific coast in South America in the pre-Columbian times, and so early. The significant genetic mixing that was observed testifies to numerous interactions that could have happened between peoples from Amazonia and the Pacific coast," Lanaud added.

Cacao's dispersal from Ecuador to Mesoamerica may have occurred through vast and interconnected political-economic networks, according to the researchers.

"First of all, we can firmly state that the origin of cacao and its domestication was the Upper Amazon and not in the tropics of Mesoamerica - Mexico and Central America. The process of dispersal was rather quick and involved the close and long-distance interaction of the Amerindian people," said archaeologist and study co-author Francisco Valdez of the PALOC unit of France's IRD research institution and Museum National d'Histoire Naturelle in Paris.

"Maritime contacts must have been involved as well as the inland contacts. Previously, the common (belief) was that cacao was domesticated in the Mesoamerican lowlands and that it was dispersed from there to the south," Valdez said.

The study provides insight into the earliest trade in what is now one of the world's most important cash crops. Today's sugary chocolate confections differ greatly from cacao's early uses. Before Europeans reached the Americas five centuries ago, cultures like the Aztecs and Maya prepared it as a drink, mixed with various spices or other ingredients.

"Cacao as a plant is an energy-source food, as well as a medicinal product," Valdez said. "Amerindian people used it in many ways. Raw, the pulp was sucked. The (cacao seed) could be cooked, roasted, grinded and made into liquid and solid foods. The bark, branches and the cob can be burned, and the ashes are an antiseptic. And it is also used to relieve skin or muscle inflammations and sores."



SpaceX Starship Explodes During Routine Test

Flames rise as a SpaceX rocket explodes in Brownsville, Texas, US, June 18, 2025, in this screengrab obtained from a social media video. TheRocketFuture via X/via REUTERS
Flames rise as a SpaceX rocket explodes in Brownsville, Texas, US, June 18, 2025, in this screengrab obtained from a social media video. TheRocketFuture via X/via REUTERS
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SpaceX Starship Explodes During Routine Test

Flames rise as a SpaceX rocket explodes in Brownsville, Texas, US, June 18, 2025, in this screengrab obtained from a social media video. TheRocketFuture via X/via REUTERS
Flames rise as a SpaceX rocket explodes in Brownsville, Texas, US, June 18, 2025, in this screengrab obtained from a social media video. TheRocketFuture via X/via REUTERS

One of Elon Musk's SpaceX Starships exploded during a routine test late Wednesday in Texas, law enforcement said, in the latest setback to the billionaire's dream of turning humanity into an interplanetary species.

The Starship 36 suffered "catastrophic failure and exploded" at the Starbase launch facility shortly after 11:00 pm (0400 GMT Thursday), a Facebook post by the Cameron County authorities said, according to AFP.

A video shared with the post showed the megarocket attached to the launch arm, and then a flash and a towering, fiery explosion.

Musk's Space X said the rocket was preparing for the tenth flight test when it "experienced a major anomaly while on a test stand at Starbase," without elaborating on the nature of the complication.

"A safety clear area around the site was maintained throughout the operation and all personnel are safe and accounted for," Space X added on social media.

"There are no hazards to residents in surrounding communities, and we ask that individuals do not attempt to approach the area while safing operations continue."

The Starship was not scheduled for launch on Wednesday evening when the explosion occurred during a "routine static fire test," according to the Cameron County authorities.

During a static fire, part of the procedures preceding a launch, the Starship's Super Heavy booster would be anchored to the ground to prevent it from lifting off during the test-firing.

Starbase on the south Texas coast, near the border with Mexico, is the headquarters for Musk's space project.

Standing 403 feet (123 meters) tall, Starship is the world's largest and most powerful rocket and central to Musk's long-term vision of colonizing Mars.

The Starship is billed as a fully reusable rocket with a payload capacity of up to 150 metric tons.

The latest setback follows an explosion of a prototype Starship over the Indian Ocean in late May.

The biggest and most powerful launch vehicle ever built had lifted off on May 27 from the Starbase facility, but the first-stage Super Heavy booster blew up instead of executing its planned splashdown in the Gulf of Mexico.

The previous two outings also ended poorly, with the upper stage disintegrating over the Caribbean.

But the failures will likely do little to dent Musk's spacefaring ambitions.

SpaceX has been betting that its "fail fast, learn fast" ethos, which has helped it dominate commercial spaceflight, will eventually pay off.

The company has caught the Super Heavy booster in the launch tower's giant robotic arms three times -- a daring engineering feat it sees as key to rapid reusability and slashing costs.

NASA is also increasingly reliant on SpaceX, whose Dragon spacecraft is vital for ferrying astronauts to and from the International Space Station.

The Federal Aviation Administration (FAA) in early May approved an increase in annual Starship rocket launches from five to 25, stating that the increased frequency would not adversely impact the environment.

The decision overruled objections from conservation groups who had warned the expansion could endanger sea turtles and shorebirds.