Eric Walker added Small, sharp blades mark the change from Middle to Later Stone Age in coastal Kenya | National Academy of Sciences to a number of topics

Eric Walker added Later Stone Age - Wikipedia to Later Stone Age (LSA)

Eric Walker added Later Stone Age - Wikipedia and Small, sharp blades mark the change from Middle to Later Stone Age in coastal Kenya | National Academy of Sciences to Later Stone Age (LSA), and added Later Stone Age (LSA) to Africa

Eric Walker added a number of topics and a number of links to Africa, and added Africa to Continents