Unveiling the Ancient African Migration Routes and Climate Shifts

New research explains that the Sahara Desert was once a green savannah due to changes in Earth's orbit, specifically the wobbling of the planet on its axis every 21,000 years. This caused warmer summers in the Northern Hemisphere, leading to increased rainfall and the spread of vegetation across the desert. The study highlights the sensitivity of the Sahara to past climate changes and provides insights into the implications of present-day climate change. Understanding these patterns can help predict future greening in response to climate change and its impact on the environment.