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Fossil analysis suggests bipedalism in early human ancestor Sahelanthropus tchadensis emerged 7 million years ago, pushing back evidence by a million years.
A new study analyzing fossil femurs from a 7-million-year-old primate, Sahelanthropus tchadensis, suggests early bipedal adaptations emerged much earlier than previously thought.
Researchers identified human-like bone features linked to upright walking, such as a femoral twist and bony structures for muscle and ligament attachment, indicating possible bipedalism in an otherwise ape-like ancestor.
While the findings push back the origins of walking on two legs by about a million years, experts caution that definitive proof requires more complete fossils, like a pelvis or knee joint, which remain undiscovered.
The study contributes to ongoing debates about the gradual evolution of human locomotion, though the exact timing and environmental drivers remain uncertain.
El análisis de fósiles sugiere que el bipedalismo en el ancestro humano temprano Sahelanthropus tchadensis surgió hace 7 millones de años, retrasando la evidencia en un millón de años.