Researchers analyzed the ancient DNA of two mummies from what is now Libya to learn about people who lived in the "Green Sahara" 7,000 years ago.

Unknown human lineage lived in 'Green Sahara' 7,000 years ago, ancient DNA reveals

Currently a harsh, arid sandscape, it's hard to believe the Sahara was once studded with sparkling water bodies that nourished lush green savannas.

Once Lush Sahara Was Home to a Surprisingly Unique Group of Humans

Ancient DNA sheds light on a fleeting, lush interlude of North African prehistory