New study of 7-million-year-old fossils from Chad proves Sahelanthropus tchadensis walked upright while still climbing trees.

Learn how detailed 3D analysis uncovered evidence that upright walking emerged near the very start of the human lineage.

Scientists may have cracked the case of whether a seven-million-year-old fossil could walk upright. A new study found strong ...

A modern analysis of 7-million-year-old remains suggest this mysterious ancient primate is the oldest human ancestor ever found.

A couple of decades ago, anthropologists unearthed an enigmatic ape-like fossil that roamed the Sahara region over 7 million ...

A new fossil analysis supports the idea a human ancestor was walking upright far earlier than previously thought.

In recent decades, scientists have debated whether a seven-million-year-old fossil was bipedal—a trait that would make it the ...

Looking at human history, there is a scene where beings who once walked on four legs suddenly stood upright. Scholars ...

What may be the earliest-known human ancestor, an ape-man called Sahelanthropus tchadensis who lived in Africa roughly 7 million years ago, walked upright for much of the time, according to a new ...

In 2001, researchers unearthed a partial fossil leg bone and two forearm bones in the central African nation of Chad. Those fossils come from the earliest known hominid, which lived around 7 million ...