A Pair of 7,000-Year-Old Sahara Skeletons Revealed a Hidden Human Lineage With a Story Stranger Than Expected. Two women buried 7,000 years ago in a Libyan rock shelter have no business being genetically mysterious. They lived during the African Humid Period, a stretch of millennia when the Sahara Desert transformed into a green savannah with lakes, rivers, a... [5917 chars]