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People made tools from bronze before they figured out how to make them from iron because iron's melting point is higher than that of bronze or its components.
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.
Neolithic culture appeared in many parts of Thailand, Mae Hong Son, Kanchanaburi, Nakhon Ratchasima, Ubon Ratchathani about 9000 BCE.
It lived in the mouth of caves near streams or other water supplies. Geneticists have proved that there was no inter-breeding between modern human immigrants to Southeast Asia and Homo erectus, The Neolithic or "New" Stone Age was a period in the development of human technology that is traditionally the last part of the Stone Age.) is an archaeological site in Nong Han District, Udon Thani Province.Dating of the artefacts using the thermoluminescence technique resulted in 4420-3400 BCE dates.The bronze objects include ornaments, spearheads, axes and adzes, hooks, blades, and little bells.The Iron Age was the stage in the development of people in which tools and weapons whose main ingredient was iron were prominent.