Monday, June 9, 2003 (SF Chronicle)
Genes generate a map/Study tracks human evolution, migration
Carl T. Hall, Chronicle Science Writer
Some of the most provocative new findings about the origins and worldwide spread of the human species are coming from studies of the history books packed inside nearly every cell of our bodies.
Genes speak volumes about our beginnings in Africa an estimated 130,000 to 200,000 years ago, our divergence into distinct populations of hunter-gatherers and farmers, our migration into Europe and Asia, and finally our settling in the Americas, perhaps 30,000 years ago.
Such studies even offer an evolutionary reason for why some of us can’t tolerate milk.