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Debate Erupts Over Sahelanthropus Tchadensis Bipedalism Evidence

1/3/2026

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Summary

Story summary

New research suggests Sahelanthropus tchadensis may have walked upright, based on thigh and forearm bones indicating bipedal traits.
Dr. Scott Williams, the lead researcher, argues the species adapted to terrestrial bipedalism while remaining arboreal.
Some experts, including Dr. Marine Cazenave, question the evidence.
The debate continues as researchers call for more fossils to reach a consensus.
The findings were published in Science Advances.

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Story summary

New research suggests Sahelanthropus tchadensis may have walked upright, based on thigh and forearm bones indicating bipedal traits.
Dr. Scott Williams, the lead researcher, argues the species adapted to terrestrial bipedalism while remaining arboreal.
Some experts, including Dr. Marine Cazenave, question the evidence.
The debate continues as researchers call for more fossils to reach a consensus.
The findings were published in Science Advances.