[citation needed] Stone artefacts dating to 40,000 years ago have been found at Tham Lod Rockshelter in Mae Hong Son.
Geneticists have proved that there was no inter-breeding between modern human immigrants to Southeast Asia and Homo erectus,[3] affirming that the Thai descended from Africans in accordance with the Recent single-origin hypothesis.
[6] Neolithic culture appeared in many parts of Thailand, Mae Hong Son, Kanchanaburi, Nakhon Ratchasima, Ubon Ratchathani about 9000 BCE.
[citation needed] Spirit Cave (Thai: ถ้ำผีแมน) is an archaeological site in Pang Mapha District, Mae Hong Son Province, northwestern Thailand.
Lang Kamnan Cave (Thai: ถ้ำแล่งกำนัน) is an archaeological site in Muang District, Kanchanaburi Province, and is on a limestone upland, facing northeast and 110 m above sea level.
Seven mortuary phases were identified in the excavation, including 154 graves, yielding abundant archaeological remains, such as fish, crab, hearths, post holes, and the burials of adults and infants.
[12] By analysing the change in mortuary practices and the isotopes of strontium, carbon, and oxygen found within dental remains, archaeologists have examined the possibility of integration between an inland agriculture with the coastal hunter-gathers of Khok Phanom Di.
[13] The isotopic studies showed that in earlier phases, the female inhabitants in the site were immigrants from both inland and coastal areas, while males were raised locally.
The adoption of this material coincided with other changes in some past societies, often including differing agricultural practices, religious beliefs and artistic styles, although this was not always the case.
Archaeological sites in Thailand, such as None Nok Tha, Lopburi Artillery centre, Ong Ba Cave and Ban Don Ta Phet show iron implements in the period between 3,400 and 1,700 years ago Non Nok Tha (Thai: โนนนกทา) is an archaeological site in Phu Wiang District, Khon Kaen Province, northeastern Thailand, dating from 1420 to 50 BCE.
Ong Ba Cave (Thai: องบะ) is an archaeological site in Sri Sawat District, Kanchanaburi Province, western Thailand, dating from 310 to 150 BCE.
Ban Don Ta Phet (Thai: บ้านดอนตาเพชร) is an archaeological site in Phanom Thuan District, Kanchanaburi Province, western Thailand, dating from 24 BCE to 276 CE.
Such artefacts include flat hexagonal shaped carnelians, small stone figurines of lions and tigers, and various metallic vessels.