A new study reveals a long-isolated North African human lineage in the Central Sahara during the African humid period more than 7,000 years ago To the point DNA analysis from two naturally mummified individuals from Libya: More than 7,000 years ago, during the so-called African Humid Period (Green Sahara), a long isolated human lineage existed in North Africa. Limited gene flow: The genomes do not carry sub-Saharan African ancestry, suggesting that, contrary to previous interpretations, the Green Sahara was not a migration corridor between Northern and Sub-Saharan Africa. The spread of migratory herding in the Green Sahara probably occurred through...