- A mysterious grave from the past was found hidden inside caves scattered in the highlands of northwest Thailand. The grave is shaped like a large and long wooden coffin.

The following is the translation of the given 'Bahasa' text to 'English' while preserving any html tags: "Author of studies and biologist expert from Naresuan University Thailand, Wibhu Kutanan, stated that the results of his research contribute to the emergence of a complex genetic landscape in mainland Southeast Asia after the Neolithic era."

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.