Pacemaker need in Africa outpacing resources

Physical evidence found in caves in Laos helps tell a story about a connection between the end of the Green Sahara, when once heavily vegetated Northern Africa became a hyper-arid landscape, and a previously unknown megadrought that crippled Southeast Asia 4,000 to 5,000 years ago.

In a paper published in Nature Communications, scientists at the University of California, Irvine, University of Pennsylvania, William Paterson University of New Jersey, and other international institutions explain how this major climate transformation led to a shift in human settlement patterns in Southeast…

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