In 1972, Taieb invited Yves Coppens, a French paleontologist, Jon Kalb, an American geologist, and Donald Johanson, an American anthropologist, to survey the region in order to appraise the area’s field exploration potential.
Jon Kalb, who was working in the Afar region at the time, provides a narrative which reconciles the two accounts.
According to Jon Kalb, early maps show caravan routes passing within 10 or 15 kilometers of Hadar but not through it.
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