A 7-Million-Year-Old Skull Starts a Debate: Did Our Oldest Ancestor Walk Upright?
7 million years ago, present-day northern Chad lay near woodlands, lakes, rivers, and open grasslands. The famous fossils of Sahelanthropus tchadensis, discovered at Toros-Menalla, were not part of today’s dry Sahara. Researchers believe Sahelanthropus tchadensis spent much of its time in wooded habitats near water rather than in open grasslands. It may have climbed trees to hide from predators in dense vegetation or moved on the ground in search of food and fresh water. Its varied habitat is one factor in the debates about the evolution of early upright walking. Archaeologists ask whether bipedalism may have emerged before humans fully adapted to open savannas. Africa’s climate was gradually drying. Forests were changing to grasslands. Versatile primates that could move easily in both trees and on the ground would have a greater chance of survival.
A new analysis of the 7-million-year-old fossils of Sahelanthropus tchadensis, one of the oldest known candidates for the human lineage (discovered in 2001 by a team led by Michel Brunet), has renewed scientific debate over when humans first began walking upright. Researchers led by Scott Williams believe they have the answer to the key question: Was Sahelanthropus a habitual biped, always walking upright, or an ape that sometimes stood on two legs?
www.Ancient-Origins.net – Reconstructing the story of humanity’s past
Source: https://www.ancient-origins.net/human-origins-science/7-million-year-old-fossil-ancestor-walk-upright-00102957
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