The eye of the Sahara — how such a bizarre formation came to be
This has got to be one of the strangest places on Earth- - but you couldn't make much of it ...
This has got to be one of the strangest places on Earth- - but you couldn't make much of it ...
They cover more than one-fifth of the planet and are on every continent
It will be another 10,000 years before the Sahara ought to turn into a savannah.