where did language come from?

Some of the earliest examples are the Indus script (India, undeciphered, around 3500 b.c.), Sumerian cuneiform (Iraq, 3100 b.c.), Proto-Elamite cuneiform (Iran, undeciphered, around 3100 b.c.), and Proto-Egyptian hieroglyphs (around 3300 b.c.). ..

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