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Footprints Reshape What Scientists Know About Extinct Human Relative

Advanced imaging and bone comparisons found traits linked to bipedalism in Sahelanthropus tchadensis, strengthening the case for an early human ancestor.

  • A new study in Science Advances presents evidence that Sahelanthropus tchadensis, a seven-million-year-old fossil species, was capable of upright walking, suggesting bipedalism evolved early in the human lineage.
  • For decades, researchers argued over whether the ancient fossil could walk on two legs, as early research focused on the skull, which provided limited insight into how the species actually moved.
  • NYU anthropologist Scott Williams identified a femoral tubercle in Sahelanthropus that anchors the iliofemoral ligament, critical for upright walking; researchers also found a relatively long femur supporting bipedal behavior.
  • Separately, researchers found 21 footprints at Lake Turkana in Kenya dating to 1.4 million years ago, revealing that Paranthropus individuals were taller than previously thought and traveled in groups.
  • According to study lead Kevin Hatala, these findings provide a "snapshot" of early hominin life, reshaping scientists' understanding of human evolution and our ancient relatives' movement and behavior.
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The Paintsville HeraldThe Paintsville Herald
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Footprints reshape what scientists know about extinct human relative

A trackway in northern Kenya preserves a "snapshot" of how individuals of an ancient hominin species interacted with one another.

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Science Daily broke the news in Encinitas, United States on Monday, July 27, 2026.
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