The Vedas<span> are a collection of hymns and other religious texts composed in India between about 1500 and 1000 BCE.
</span>The Rig Veda is a collection of Vedic Sanskrit hymns.<span>
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<span>The Sama Veda is the Veda of melodies and chants.
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<span>The Atharva Veda is the "knowledge storehouse of atharvāṇas, the procedures for everyday life".</span><span>
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Well from what I know they did use obsidian, they did live in large numbers and did take shelter in the highlands. Hope this helps
Shi huangdi was the first emperor