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https://www.popularmechanics.com/science/a69144634/ardi-skeleton-human-evolution-climbing-to-walking/
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10/28/25 at 1:00pm
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Popular Mechanics
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Elizabeth Rayne
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Scientists studying a 4.4-million-year-old fossil named Ardi may have uncovered the evolutionary step that turned ancient climbers into early walkers.
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