"Dream - A mysterious grave from the past has been found hidden within caves scattered across the northwestern highlands of Thailand. The grave takes the form of a coffin made from a sufficiently large and long piece of wood."

The author of the study and biologist from Naresuan University Thailand, Wibhu Kutanan, said that the results of his research contribute to the emergence of a complex genetic landscape in mainland Southeast Asia after the Neolithic period.

The presence of the coffin raises questions about the reasons why people in the Iron Age went through the trouble of raising the long wooden pole and placing it on the stage. There is a speculation that the coffin has spiritual value.

However, it is proven that other ancient cultures from mainland Southeast Asia have similar traditions. More than 170 boat-shaped coffins have been found from 44 different archaeological sites around Vietnam.

As shown by the study, there were a large number of migrations and assimilations in Southeast Asia over 2,000 years ago. Looking at this interconnectivity, it is not surprising that not only genetic information was inherited, but also cultural information.