Which is a reason that archaeologists and historians do not have extensive information about the Indus Valley civilization?

Lack of written records and sources

The Indus Valley civilization did not leave behind any written records, such as books or inscriptions. This makes it difficult for archaeologists and historians to gain insights into the civilization's political, economic, and cultural structures.

When and where was tomb found?

Why were alchemists during the Middle Ages searching for stone?

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