Ancient Africa's Climate Was Unexpectedly Rainy, Muddying Story of Early Humans
10 months ago
- #Paleoclimatology
- #human evolution
- #climate change
- New research challenges the belief that Northern Africa experienced a dry spell between 3.5 million and 2.5 million years ago, suggesting stable rainfall instead.
- The study analyzed leaf waxes in ocean sediment cores, revealing no significant drying trends during the Plio-Pleistocene transition.
- Previous studies relied on dust deposits to argue for aridification, but the new findings suggest dust may relate to wind patterns rather than rainfall changes.
- The research questions the idea that drier conditions drove hominin evolution, such as the emergence of the Homo genus.
- The findings could inform future climate predictions, as CO2 levels during the transition were similar to today's but decreasing, unlike current trends.
- The study highlights the need to determine when Africa shifted to drier conditions and what factors influenced ancient human evolution.