Luscious, Green Sahara
When people think of Sahara, a vast desert land with minimal rainfall and all sorts of lizard critters come to mind. However, if you asked someone 6,000 years ago, they’d probably draw you an entirely different image (assuming you could speak the same language as them). You see, the Sahara Desert wasn’t always a desert.
In fact, scientists theorize that the Sahara was once a luscious marshland filled with green vegetation, freshwater fish, and amphibians. However, when the Strait of Gibraltar closed by natural means, the flow of water into the Saharan lakes eventually dried up. And over a period of thousands of years, it became the sandy landscape we currently know it as.