The reasons why Louis and Mary Leakey spent decades at Olduvai Gorge was because the area had the oldest evidence of the evolution of man.
Olduvai is a place that is located in Tanzania. This area is a paleoanthropological site. It was at this place that a fossil named Zinjanthropus bosei that was said to be up to 2 million years was found.
Also the Homo-habilis was discovered here. That is man's oldest ancestor. This has led scientists to the assertion that man first evolved in Africa.
These major findings made the lives of this family to revolve around the area.
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