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This 3.6-million-year-old footprint was made by our earliest known ancestor. Now it’s at risk of being lost forever
By Maureen O’Hare, CNN (CNN) — In travel news this week: why climate change might make airplane turbulence worse, the best beaches in the United States just in time for Memorial Day and the record-breaking US pilot whose achievement was kept a secret for years. Our changing world The Laetoli footprints on the southern edge
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