'The stage was now set for the birth and growth of desert dunes': How the Sahara turned from a vast forest to the arid landscape we see today

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In this extract from the book "When the Sahara Was Green", Martin Williams, professor of earth sciences at the University of Adelaide, explores how a vanishing ocean and global cooling set the stage for the birth of the Sahara desert.

'The stage was now set for the birth and growth of desert dunes': How the Sahara turned from a vast forest to the arid landscape we see today : Read more