The Sahara has not always been the dry barrier familiar today. During its most recent humid interval, grasslands, wooded savanna, wetlands and lakes spread across large parts of North Africa. People settled beside the water, while fish, crocodiles and hippopotamuses occupied places that are now among the most arid on Earth. These “Green Sahara” episodes [...] The post The Sahara turns green roughly every 20,000 years, and the last time it did, hippos and crocodiles lived in lakes where there is now only sand appeared first on Space Daily .
The Sahara turns green roughly every 20,000 years, and the last time it did, hippos and crocodiles lived in lakes where there is now only sand
