Evidence of upright walking found in 7-million-year-old Sahelanthropus fossils‎

In recent decades, scientists have debated whether a seven-million-year-old fossil was bipedal—a trait that would make it the oldest human ancestor. A new analysis by a team of anthropologists offers powerful evidence that Sahelanthropus tchadensis—a species discovered in the early 2000s—was indeed bipedal by uncovering a feature found only in bipedal hominins.