Labels:text | screenshot OCR: The weedjest-known human structure may be the footi f a windbreak. It is a rough circle of loosely piled la ... blocks found on the lowest cultural level at the Lower Paleolithic site at Olduvai Gorge in Tanzania, revealed by Dr Mary Leakey in January 1960. The ring of several hundred stones was Page 1 of 5 igs - Earliest Structure&: Background This record has a picture. menu
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