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THE EXCAVATIONS OF CARLOS RIBEIRO

By Michael A. Cremo. In the 1860s, Portuguese geologist Carlos Ribeiro found worked flints in Miocene strata dated at five to 25 million years old, but his findings on an earlier date for the emergence of toolmaking humans are largely unknown today.
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Description THE EXCAVATIONS OF CARLOS RIBEIRO
By Michael A. Cremo. 
In the 1860s, Portuguese geologist Carlos Ribeiro found worked flints in Miocene strata dated at five to 25 million years old, but his findings on an earlier date for the emergence of toolmaking humans are largely unknown today.

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