One of the most interesting sites in the history of early man is the Makapan Valley in South Africa (TIME, Jan. 17). As the Makapan River cut its valley during a million years, it formed a series of limestone caves that were inhabited successively by all manner of men and beasts. In some of the lowest layers, C. K. Brain of the Transvaal Museum found smallish stones that had been chipped into crude tools. Geological studies hinted that this primitive "pebble culture" might date from as much as 750,000 years ago.
Most likely candidate...
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