After decades of speculation and research, a team led by two Australian researchers and one Laotian researcher have dated these jars. Using a fossil-dating technology known as Optically Stimulated Luminescence (OSL), the team examined sediment from underneath jars at 120 different locations, discovering that they were constructed sometime between 1240 and 660 BCE.
Dr. Louise Shewan from the University of Melbourne explains,
“With these new data and radiocarbon dates obtained for skeletal material and charcoal from other burial contexts, we now know that these sites have maintained enduring ritual significance from the period of their initial jar placement into historic times.”
How the jars were moved around Laos remains unknown. As with other ancient mysteries—the various henges around Scotland and England; the interconnected network of cities in the Harappan civilization—understanding the rituals associated with and technologies used to create awe-inspiring monuments remains a dream for many archaeologists.