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Home Tech & Gadgets This is why the Rift Valley may not be the only cradle of humanity

This is why the Rift Valley may not be the only cradle of humanity

by Jeffrey Beilley
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The idea that the East African Rift System (EARS) is the exclusive cradle of humanity may be outdated. While much of our knowledge of early humans comes from fossils found in this region, this story is shaped by the fact that fossils only survive under specific conditions, such as those found in sedimentary basins like the Great Rift Valley. This narrow focus ignores the likelihood that early humans lived in many other areas of Africa, where fossils may not have been preserved.

The Rift Valley: A Fragment of a Larger Puzzle

The Great Rift Valley, particularly sites like the Olduvai Rift in Tanzania, has yielded important discoveries, such as the remains of Paranthropus boisei and Homo habilis, extinct hominid species that date to the Early Pleistocene of East and South Africa, respectively, about 2.5 to 1.15 million years ago. However, the Rift covers less than one percent of the African continent. Since early humans likely covered much larger areas, our understanding of human evolution is based on a sliver of the available evidence. For example, modern mammals occupy much larger home ranges, suggesting that early humans did so as well.

Missing pieces in the evolutionary puzzle

Research suggests that focusing solely on the Rift Valley may lead to an incomplete understanding of early human diversity. Studies of African primates reveal variations in size and morphology across regions that would be missed if we focused solely on the Rift Valley. The same may be true for early hominins, whose remains have either not been found outside the Rift Valley or have been lost over time. This raises questions about how representative the Rift Valley fossil record is of early human evolution.

Conclusion: Extending the Quest Beyond the Rift

In conclusion, the focus on the Rift Valley has shaped our understanding of human evolution, but it is important to recognize that early humans likely lived in a wider range of environments across Africa. This realization leads to a reappraisal of the Rift Valley’s role as the unique “Cradle of Humanity” and emphasizes the need to look beyond this region to fill in the gaps in the human story.

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