An approximately 4.4-million-year-old fossil hominin with an informative, incomplete skeleton. Its inferred locomotor mosaic differs from treating a living chimpanzee as an unchanged human ancestor. [ref]
Ardipithecus ramidus and the paleobiology of early hominids by Tim D. White and others. Science 326, pp. 75–86; 4.4 Ma skeleton and locomotor mosaic
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