About this episode
Did you know that the world's largest desert isn't the Sahara? The biggest deserted landscapes are actually the cold ones: located in Antarctica and the Arctic. About 20,000 years ago, the Sahara was actually one big oasis. Now its boundaries are expanding: since the 1920s, the Sahara is considered to have grown by over 10%. Let's find out how this process can affect the world.
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